Anthropologists Typically Conduct Fieldwork as Participants, Living and Coexisting with Those

Anthropologists typically conduct fieldwork as participants, living and coexisting with those they study. Why is it that anthropologists believe religion, as a set of beliefs about how the world ought to be, can also be successfully studied in this manner?

A) Religion can only be understood by participating in formal religious services.
B) Religion is also lived out in a community of people.
C) Participant observation can also reveal if a religion is true or false.
D) Religion is also useful as a theoretical understanding of daily life.