Millions of words have been written about young people in the United States. There are reasons for this great interest in the ideas, feelings, and actions of youth.
Today there are about seven million Americans in the colleges and universities. Young persons under twenty-five make up nearly half of the American population. Many of these will soon be in charge of the nation. Naturally, their ideas are important to everyone in the country, and it is necessary for older people to understand what they think and feel.
College students today have strong opinions about right and wrong. They are deeply interested in making a better life for all people, especially for those who have not been given a fair chance before now. They see much that is wrong in the lives of their parents. It is hard for them to see what is right and good in the older ways. As a result, there is often trouble in American families.
Which of the following statements is true？

A. People haven't written much about American youth.
B. Writers have wasted a great deal of their effort(努力)to write about American youth.
C. Much has been written about American youth.
D. Young people's ideas are not important enough to the United States.