单项选择题

Hollywood and American Movie Industry
When we think of Hollywood a term I use loosely to describe American movie production in general, not simply films made in Los Angeles we think of films aimed at amusing audiences and making money for producers.
During the early years of the new century, as workers won their demands for higher wages and a shorter working week, leisure assumed an increasingly important role in everyday life. Amusement parks, professional baseball games, nickelodeons (五分钱戏院), and dance halls attracted wide array of men and women anxious to spend their hard earned dollars in the pursuit of fun and relaxation. Yet of all these new cultural endeavors, films were the most important and widely attended source of amusement. For a mere five or ten cents, even the poorest worker could afford to take himself and his family to the local nickelodeon or storefront theatre. "Every little town that has never been able to afford and maintain an opera house, "observed one journalist in 1908. "now boasts one or two’ Bijou Dreams’. "By 1910 the appeal of films was so great that nearly one -third of the nation flocked to the cinema each week; ten years later, weekly attendance equaled 50 per cent of the nation’s population.
Early films were primarily aimed at entertaining audiences, but entertainment did not always come in the form of escapist fantasies. Many of the issues that dominated Progressive - era politics were also portrayed on the screen. "Between 1900 and 1917 ,"observes Kevin Brownlow, "literally thousands of films dealt with the most pressing problems of the day—white slavery, political corruption, gangsterism (犯罪) , loansharking (高利贷), slum landlords, racial prejudice, etc. "While most of these films were produced by studios and independent companies, a significant number were made by what we might call today" special interest groups". As films quickly emerged as the nation’s most popular form of mass entertainment, they attracted the attention of a wide range of organizations that recognized the medium’s enormous potential for disseminating propaganda to millions of viewers.
It can be concluded from the last paragraph that

A.many of the social and political problems were reflected on the screen of the films.
B.films often dealt with the most important problems of the day.
C.films quickly became a very popular form of entertainment.
D.because of the large attendance, films had a great influence on a large number of peopl