According to a Recent Analysis of Data from a Sample

According to a recent analysis of data from a sample of nationally representative high school seniors, which of the following statements regarding adolescents' civic engagement and political participation is true?

A) Since 1990, there has been a steady decrease in the proportion of young people who report participating in community service activities.
B) Between 1976 and 1990, there was a decrease in the proportion of young people participating in conventional civic activities (e.g., voting, contacting elected officials) .
C) Since 1990, the proportion of young people who engage in alternative political activities (e.g., boycotts, demonstrations) has increased.
D) Between 1976 and 1990, participation in alternative political activities (e.g., boycotts, demonstrations) decreased.