Which of the Following Statements Is True of Cross-Cultural Studies

Which of the following statements is true of cross-cultural studies?

A) They allow anthropologists to make distinctions between behaviors that are culture specific and those that are universal.
B) They make it possible for anthropologists to determine if a social trait is biologically inherited or culturally derived.
C) They are no longer used by anthropologists because this older methodology has been shown to produce False results due to both temporal and geographic lag.
D) They cannot be conducted today because there has been too much migration from one culture to another due to modern transportation.