Early Anthropologists Assumed Descent Groups Would Be Key to Understanding

Early anthropologists assumed descent groups would be key to understanding each culture's economic,political,and religious dynamics in large part because

A) their own experience in fieldwork had already established this as true.
B) the narratives of travelers from other parts of the world reflected this idea.
C) their own experience as Europeans was the opposite and that this must therefore be true.
D) their inability to speak local languages resulted in confusion about relationships.