Research Assessing Parent-Adolescent Communication About Sex Has Found All of the Following

Research assessing parent-adolescent communication about sex has found all of the following, except:

A) although parents may indicate that they talked to their adolescents about a topic, such as sexually transmitted diseases, their adolescents are likely to say they have not.
B) parents believe that if they express their disapproval of sexual activity, their adolescents will not be sexually active.
C) parent-adolescent communication about sex significantly lowers adolescents' likelihood of being sexually active.
D) parent-adolescent communication about contraception lowers the rate of risky sex.