One of These Statements Below Is a General, Underlying Assumption

One of these statements below is a general, underlying assumption about the emergence of culture. Which one is it? (The other three are different theories about why it has emerged.)

A) Culture is a by-product of human interaction.
B) Culture provides a shared experience for individuals.
C) There is an evolutionary, functional advantage in the emergence of culture.
D) We are reassured about a broader meaning and purpose in life through a cultural perspective.