A Recent Cross-Cultural Study of 87 Societies, All of Which

A recent cross-cultural study of 87 societies, all of which had incest taboos, investigated the rate at which such taboos were broken. The results of this study add to the evidence that

A) cultural universals, like the human ability to make fire, always have a genetic basis.
B) Freud was right: children everywhere have sexual feelings toward their parents.
C) although tabooed, incest does happen.
D) many societies need better educational systems.
E) many societies need better techniques of social control.