Research into Sexual Activity Among Adolescents Has Found That

Research into sexual activity among adolescents has found that

A) most adolescents only consider an activity that culminates in an orgasm to be sex.
B) almost all adolescents define vaginal intercourse as sex, but very few consider other forms of intercourse to be sex.
C) there is wide variation in what activities adolescents think count as sex.
D) adolescents largely agree that any activity that involves genital touching counts as sex.