Which of the Following Is NOT an Explanation for Why

Which of the following is NOT an explanation for why the U.S.has a higher adolescent pregnancy rate than many European nations?

A) American teens are more sexually active than European teens.
B) American teens are less likely than European teens to use contraceptives.
C) Abstinence-only sex education is more common in the U.S. than in European nations.
D) American society is more tolerant than European nations of adolescent childbearing.