While on a Camping Trip,Brian Collects a White Tadpole from a Pond

Multiple Choice

While on a camping trip,Brian collects a white tadpole from a pond and takes it home.The tadpole develops into a white bullfrog.When the frog gets too big,he releases 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.