Detailed Census Records Made in Roman Egypt Indicate That Brother-Sister

Detailed census records made in Roman Egypt indicate that brother-sister marriages among members of the non-royal farming class were common.What does this tell us about the incest taboo?

A) that humans are no different from chimpanzees
B) that incest is committed mainly among the lower classes in developing countries
C) that despite the human tendency to avoid inbreeding,it sometimes is actually encouraged
D) that it supports Freud's findings about the universality of the Oedipus complex