Which of the Following Is an Accurate Description of the Trend

Multiple Choice

Which of the following is an accurate description of the trend in U.S.adolescents' drug use today?

A) The proportions of eighth-,tenth-,and twelfth-grade U.S.students using illicit drugs declined in the late 1990s and the first years of the twenty-first century.
B) The use of drugs among U.S.secondary-school students began to decrease in the early 1990s.
C) Cocaine is the most widely used illicit drug by U.S.adolescents in the twenty-first century.
D) All of these choices are correct.