Regarding Cultural Norms and Sexual Activity, Which of the Following

Regarding cultural norms and sexual activity, which of the following statements is FALSE?

A) It is rare for children in any culture to engage in preadolescent sex play.
B) Apart from cultural norms, it can be said that any sexual act engaged in by consenting adults is "normal" if it does not hurt anyone.
C) Different kinds of sexual activity occur more frequently in societies that place fewer restrictions on sexual behavior.
D) In Western cultures, sex between children, incest, prostitution, and extramarital sex are all discouraged.