What Does It Mean to Say That Anthropologists Are "Studying

What does it mean to say that anthropologists are "studying up"?

A) They are preparing a great deal of background research.
B) They are studying architectural and space-use aspects within a situation.
C) They are gathering information from people who are powerful and influential in the society.
D) They are working with the lowest social classes and will eventually move up the social scale to interview others.
E) They are doing comparative research between a native population and their own culture.