Your Textbook Discusses Various Theories for Cultural Incest Taboos

Your textbook discusses various theories for cultural incest taboos.What effect do these taboos have on people's incestuous behaviour?

A) Cultural prohibitions on incestuous marriages do not really regulate the incestuous behaviour of individual humans.
B) Cultural prohibitions on incestuous marriages have dramatically minimized the actual instances of incest.
C) Cultural prohibitions on incestuous marriages have actually increased the instances of family incest.
D) Cultural prohibitions on incestuous marriages are not at all reflected in legal prohibitions of incest.