Your Parents Are Concerned Because Your Younger Sister,who Just Turned

Your parents are concerned because your younger sister,who just turned 18 years old,told them that she is sexually active.What would you tell them?

A) Her behavior is very uncommon, only 10% of adolescents have had sexual intercourse before age 18.
B) Her behavior is fairly uncommon, only 25% of adolescents have had sexual intercourse before age 18.
C) Her behavior is fairly common in that 50% of adolescents have had sexual intercourse before age 18.
D) Her behavior is very common in that 80% of adolescents have had sexual intercourse before age 18.