Which of the following statements about adolescent sexual activity is correct?

A) Less than 1/3 of sexually active children report using condoms in their most recent sexual activity.
B) Of the students using contraception, more use the birth control pill than use condoms.
C) Teens who are involved in sports or after-school activities have lower rates of sexual activity than teens who do not participate in such activities.
D) Among girls, those who are sexually active are less likely to have had early menarche.

C