Research on 12th-Graders Indicates That

Research on 12th-graders indicates that

A) significantly more males than females are sexually active (i.e., have had at least one sexual encounter) .
B) significantly more females than males are sexually active (i.e., have had at least one sexual encounter) .
C) both males and females tend to be sexually active (i.e., have had at least one sexual encounter) and are so at similar rates.
D) neither males nor females are sexually active.