Which of the Following Is an Example of Nonadaptive Evolution

Which of the following is an example of nonadaptive evolution? Select the TWO answers that are correct.

A) The percentage of dark-colored moths in a population increases over time as pollution darkens tree bark.
B) A mutation causes an increase in the incidence of antibiotic sensitivity in a population of Staphylococcus aureus.
C) The gene pool of a drastically reduced population of northern elephant seals is vulnerable to chance events.
D) The allele for sickle cell anemia is more prevalent in populations of African descent because it provides resistance to infection from malaria,a parasite common in Africa.
E) Two populations of finches in the Galapagos Islands have different beak lengths,each suited to the food available within its ecological niche.