________ Is Evidence That American Teens Are Being More Responsible

________ is evidence that American teens are being more responsible than they used to be about sex, but ________ is evidence that they are not being careful enough.

A) The all-time low teen birth rate; the significant number of teenagers with sexually transmitted infections
B) The decreasing rate of sexually transmitted infections; the decreasing rate of use of birth control
C) The low number of female teens who are enthusiastic rather than ambivalent about having sex; the high number of teens having sex with those who are emotionally unimportant to them
D) The all-time low incidence of sexually transmitted infections; the general decrease in feelings of closeness with a partner