Westermark's Theory Was That People Inherently Avoid Sexual Relations with Those

Westermark's theory was that people inherently avoid sexual relations with those whom they grow up with because

A) they fear the social taboo.
B) they do not want to upset the family structure.
C) early familiarity results in dislike for one another.
D) early familiarity results in a lack of sexual attraction when they become adolescents and adults.