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There is substantial evidence that by 1926, with the publication of The Weary Blues, Langston Hughes had broken with two well-established traditions in African American literature. In The Weary Blues, Hughes chose to modify the traditions that decreed that African American literature must promote racial acceptance and integration, and that, in order to do so, it must reflect an understanding and mastery of Western European literary techniques and styles. Necessarily excluded by this decree, linguistically and thematically, was the vast amount of secular folk material in the oral tradition that had been created by Black people in the years of slavery and after. It might be pointed out that even the spirituals or “sorrow songs” of the slaves—as distinct from their secular songs and stories—had been Europeanized to make them acceptable within these African American traditions after the Civil War. In 1862 northern White writers had commented favorably on the unique and provocative melodies of these “sorrow songs” when they first heard them sung by slaves in the Carolina sea islands. But by 1916, ten years before the publication of The Weary Blues, Hurry T. Burleigh, the Black baritone soloist at New York’s ultrafashionable Saint George’s Episcopal Church, had published Jubilee Songs of the United States, with every spiritual arranged so that a concert singer could sing it “in the manner of an art song.” Clearly, the artistic work of Black people could be used to promote racial acceptance and integration only on the condition that it became Europeanized.
Even more than his rebellion against this restrictive tradition in African American art, Hughes’s expression of the vibrant folk culture of Black people established his writing as a landmark in the history of African American literature. Most of his folk poems have the distinctive marks of this folk culture’s oral tradition: they contain many instances of naming and enumeration, considerable hyperbole and understatement, and a strong infusion of street-talk rhyming. There is a deceptive veil of artlessness in these poems. Hughes prided himself on being an impromptu and impressionistic writer of poetry. His, he insisted, was not an artfully constructed poetry. Yet an analysis of his dramatic monologues and other poems reveals that his poetry was carefully and artfully crafted. In his folk poetry we find features common to all folk literature, such as dramatic ellipsis, narrative compression, rhythmic repetition, and monosyllabic emphasis. The peculiar mixture of irony and humor we find in his writing is a distinguishing feature of his folk poetry. Together, these aspects, of Hughes’s writing helped to modify the previous restrictions on the techniques and subject matter of Black writers and consequently to broaden the linguistic and thematic range of African American literature.
The author mentions which one of the following as an example of the influence of Black folk culture on Hughes’s poetry?

A.hisexploitationofambiguousanddeceptivemeanings
B.hisstrongreligiousbeliefs
C.hisuseofnamingandenumeration
D.hisuseoffirst-personnarrative
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Hormones in the Body Up to the beginning of the twentieth century, the nervous system was thought to control all communication within the body and the resulting integration of behavior. Scientists had determined that nerves ran, essentially, on electrical impulses. These impulses were thought to be the engine for thought, emotion, movement, and internal processes such as digestion. However, experiments by William Bayliss and Ernest Starling on the chemical secretin, which is produced in the small intestine when food enters the stomach, eventually challenged that view. From the small intestine, secretin travels through the bloodstream to the pancreas. There, it stimulates the release of digestive chemicals. In this fashion, the intestinal cells that produce secretin ultimately regulate the production of different chemicals in a different organ, the pancreas.Such a coordination of processes had been thought to require control by the nervous system; Bayliss and Starling showed that it could occur through chemicals alone. This discovery spurred Starting to coin the term hormone to refer to secretin, taking it from the Greek word hormon, meaning “to excite” or “to set in motion.” A hormone is a chemical produced by one tissue to make things happen elsewhere.As more hormones were discovered, they were categorized, primarily according to the process by which they operated on the body. Some glands (which make up the endocrine system) secrete hormones directly into the bloodstream. Such glands include the thyroid and the pituitary. The exocrine system consists of organs and glands that produce substances that are used outside the bloodstream, primarily for digestion. The pancreas is one such organ, although it secretes some chemicals into the blood and thus is also part of the endocrine system.Much has been learned about hormones since their discovery. Some play such key roles in regulating bodily processes or behavior that their absence would cause immediate death. The most abundant hormones have effects that are less obviously urgent but can be more far-reaching and difficult to track: They modify moods and affect human behavior, even some behavior we normally think of as voluntary. Hormonal systems are very intricate. Even minute amounts of the right chemicals can suppress appetite, calm aggression, and change the attitude of a parent toward a child. Certain hormones accelerate the development of the body, regulating growth and form; others may even define an individual’s personality characteristics. The quantities and proportions of hormones produce change with age, so scientists have given a great deal of study to shifts in the endocrine system over time in the hopes of alleviating ailments associated with aging.In fact, some hormone therapies are already very common. A combination of estrogen and progesterone has been prescribed for decades to women who want to reduce mood swings, sudden changes in body temperature, and other discomforts caused by lower natural levels of those hormones as they enter middle age. Known as hormone replacement therapy (HRT), the treatment was also believed to prevent weakening of the bones. At least one study has linked HRT with a heightened risk of heart disease and certain types of cancer. HRT may also increase the likelihood that blood clots—dangerous because they could travel through the bloodstream and block major blood vessels—will form. Some proponents of HRT have tempered their enthusiasm in the face of this new evidence, recommending it only to patients whose symptoms interfere with their abilities to live normal lives.Human growth hormone may also be given to patients who are secreting abnormally low amounts on their own. Because of the complicated effects growth hormone has on the body, such treatments are generally restricted to children who would be pathologically small in stature without it. Growth hormone affects not just physical size but also the digestion of food and the aging process. Researchers and family physicians tend to agree that it is foolhardy to dispense it in cases in which the risks are not clearly outweighed by the benefits.Which of the following sentences explains the primary goal of hormone replacement therapy?
A.Thequantitiesandproportionsofhormonesproducechangewithage,soscientistshavegivenagreatdealofstudytoshiftsintheendocrinesystemovertimeinthehopesofalleviatingailmentsassociatedwithaging
B.Acombinationofestrogenandprogesteronehasbeenprescribedfordecadestowomenwhowanttoreducemoodswings,suddenchangesinbodytemperature,andotherdiscomfortscausedbylowernaturallevelsofthosehormonesastheyentermiddleage
C.HRTmayalsoincreasethelikelihoodthatbloodclots—dangerousbecausetheycouldtravelthroughthebloodstreamandblockmajorbloodvessels—willform
D.Becauseofthecomplicatedeffectsgrowthhormonehasonthebody,suchtreatmentsaregenerallyrestrictedtochildrenwhowouldbepathologicallysmallinstaturewithoutit