While on a Camping Trip, You Collect a White Tadpole

Multiple Choice

While on a camping trip, you collect a white tadpole from a pond and take it home. The tadpole develops into a white bullfrog. When the frog gets too big, you release it into a local pond. The next year, several white bullfrogs are observed in the pond. This is an example of

A) genetic drift.
B) natural selection.
C) gene flow.
D) sexual selection.