A Widely Accepted Function of the Incest Taboo Is That

A widely accepted function of the incest taboo is that it:

A) Helps families form wider alliances.
B) Prevents recessive genes from appearing in human populations.
C) Demonstrates our connections with other primate families.
D) Raises the intelligence level of the human species.
E) Is key to maintaining the species differences between humans and other primates.