When Both Drift and Selection Are Acting on a Locus

Multiple Choice

When both drift and selection are acting on a locus (alleles are not neutral and the population size is finite) , which of the following can occur?

A) Natural selection can increase the effect of genetic drift.
B) Neutral mutations are subject to natural selection.
C) Genetic drift can result in heterozygous advantage.
D) Beneficial mutations can be lost from the population.