If Someone Were to Say the Reason a Bee Population

If someone were to say the reason a bee population contains genetic variation is to enable natural selection to select the best hereditary variants, George C. Williams would say that this claim is

A) true, because without hereditary differences, natural selection is blocked.
B) false, because selection can cause change even in genetically uniform populations.
C) false, because some populations are known to exist without genetic variation.
D) false, because it implies that genetic variation will be maintained in populations for future benefit even if the variant alleles reduce the fitness of individuals at present.