What Drives Anthropologists to Choose Such a Broad Subject of Study

What drives anthropologists to choose such a broad subject of study?

A) They believe that any generalization about humans should be applicable across time and space.
B) A key tenet within anthropology is that there is a fundamental base to all human culture.
C) Many anthropologists believe that other disciplines lack scientific rigor.
D) Anthropology attracts people who have difficulty narrowing their research focus.