You Are Studying Two Populations of a Certain Species of Frog

Multiple Choice

You are studying two populations of a certain species of frog in two ponds five kilometers apart. There are no other ponds in the area. In pond A all the frogs are small and have a few black spots on them. In pond B most of the frogs are large and lack spots but a few are small without spots and a few are large with spots. Because of the differences in these two populations

A) the distance between ponds is probably a barrier.
B) there is probably little interbreeding between the two populations.
C) the population in pond A could have gone through a genetic bottleneck.
D) All of the choices could be correct.