______ is the study of speech sounds in language or a language with reference to their distribution and patterning and to tacit rules governing pronunciation.

A．it leads to more crime in society
B．people view manners as old-fashioned
C．rudeness on the street cannot be stemmed out
D．it can seriously affect our daily life

A．unsophisticated and heavy handed
B．somber and convoluted
C．clear and concise
D．humorous and effective