Who Is Least Likely to Engage in Sexual Behaviour

Who is least likely to engage in sexual behaviour?

A) Kelly, who has a difficult relationship with her parents and whose peers have already had sex
B) Julie, who has a close relationship with her parents and whose friends have already had sex
C) Joe, who has parents who do not monitor his activities closely
D) Sara, who has a close relationship with her parents and whose friends have not already had sex