Of the Following Adolescents, Who Is Most Likely to Be

Of the following adolescents, who is most likely to be a sexual risk-taker?

A) Charlene, whose parents are divorced and whose mother works two jobs
B) Alejandro, whose parents keep track of his after-school activities and know his friends
C) Pang, who is upper middle class
D) Gary, whose older siblings are athletes and "science nerds" but are not sexually active