In which way does genetic variation within a population help to ensure the survival of a species in response to the environment in which they live?



A.
Genetic variation causes the members of the population to require a different source of food.

B.
Environmental changes which affect one organism within the population may not affect others.

C.
Genetic variation occurs when environmental conditions remain stable for an extended period of time.

D.
Environmental changes decrease genetic variation so that the population experiences fewer adaptations.