Regarding Cultural Norms and Sexual Activity, Which of the Following

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

A) As a child matures, cultural norms place greater restrictions on sexual activities.
B) As with gender roles, it is apparent that cultural restrictions on sexual behavior are somewhat arbitrary.
C) Different kinds of sexual activity occur more frequently in societies that place the most restrictions on sexual behavior.
D) Apart from cultural norms, it can be said that any sexual act in which consenting adults engage is "normal" if it does not hurt anyone with coercive and compulsive sexual behaviors being considered emotionally unhealthy.