Allele frequency refers to the fraction of individuals with a particular version of a given gene. What effect does genetic drift have on the allele frequency of a population?
A. It increases the number of alleles by combining traits from different parents, which decreases the allele frequency of existing traits.
B. It causes the allele frequency to resemble that of a small number of individuals that became separated from the rest of the population.
C. It causes random changes in allele frequency, leading to an increase or decrease in certain traits.
D. It greatly reduces the total population, which increases the effects of natural selection on allele frequency.