Which of the Following Is True About Adolescent Sexual Attitudes

Which of the following is true about adolescent sexual attitudes and behavior?

A) Rates of extramarital sex among U.S. young people are on the rise.
B) Overall, teenage sexual activity rates are lower in the United States than in other Western countries.
C) U.S. youths become sexually active later than their Canadian and European counterparts.
D) Most teenagers have had only one or two sexual partners by the end of high school.