A gene pool in a population of jackrabbits in a field remained constant for many generations. The most probable reason for this stable gene pool is that
A) no migration occurred in a large population with random mating and no mutations
B) no migration occurred in a small population with random mating and no mutations
C) no migration occurred in a large population with nonrandom mating and no mutations
D) there was much migration into and out of the large population, but mating was random and there were few mutations
E) the population was small with no mutations, no migrations, and no nonrandom mating
