Evidence That American Teens Are Being Careful with Sex Is

Evidence that American teens are being careful with sex is shown in _____ and not very careful in _____.

A) the increasing rate of use of birth control; the increasing rate of sexually transmitted infections
B) the decreasing rate of sexually transmitted infections; the decreasing rate of use of birth control
C) the rate of female teens who are enthusiastic rather than ambivalent about having sex; the rates of teens having sex with those who are emotionally unimportant to them
D) decreasing rates of sexually transmitted infections; general decrease in feelings of closeness with the partner