In the Context of Metaphysical Materialism, Sociobiologists Define Biological Altruism

In the context of metaphysical materialism, sociobiologists define biological altruism as:

A) an individual's tendency to go to great lengths to help those who share his or her genes.
B) a group's tendency to cooperate with those who are most different from them.
C) a community's use of impartial reasoning to decide which members most need their help.
D) an individual's tendency to value divinity and divine morality over objective reasoning.