Marvin Harris's Studies (1974,1978)of How Beliefs and Rituals May Function

Marvin Harris's studies (1974,1978) of how beliefs and rituals may function as part of a group's cultural adaptation to its environment are an illustration of

A) how religion can play a prominent role in cultural ecology.
B) the dangers that religious effervescence can pose to the environment if it is not contained.
C) how nonhuman primates also have a capacity for religion, although it is very limited.
D) the dangers of extending the realm of religion to nature.
E) the fact that religion is evolutionarily adaptive.