Which of the Following Statements About Group Selection Is FALSE

Which of the following statements about group selection is FALSE?

A) Variation in the proportion of cooperators and selfish phenotypes must exist among groups.
B) A key aspect of group selection models is that natural selection operates both within and between groups.
C) Between-group selection favors cooperation in kin groups but favors selfish phenotypes in nonkin groups.
D) Between-group selection favors cooperation if groups with more cooperators outreproduce groups with fewer cooperators.
E) Within-group selection always favors selfish phenotypes because they receive benefits without paying the costs of altruism.