If the Weather in Richmond, Virginia, Changed to a Very

If the weather in Richmond, Virginia, changed to a very cold climate (snow on the ground 8 months of each year) over the next few years, what change might occur?

A) Evolution would definitely occur, resulting in white squirrels.
B) Genetic drift will occur at a faster rate during the cold part of the year.
C) The cold weather would cause a mutation in squirrels that causes their fur to be white.
D) If a mutation had previously occurred that caused white fur, such white squirrels would have a better chance to survive and reproduce.