In Which of the Following Situations Would Genetic Drift Most

Multiple Choice

In which of the following situations would genetic drift most likely cause evolution?

A) The size of the gene pool increases because a smaller group establishes a new population.
B) Chance events cause allele frequencies to fluctuate unpredictably.
C) A sudden change in the environment drastically increases the population size.
D) The population has inherited traits better suited to a different environment.