If the weather in Sackville, New Brunswick changed to very cold (snow on the ground eight months of the year) over the next few years, which of the following would correctly explain the emergence of white squirrels?
the cold weather caused a mutation which results in squirrels with white coats
 a mutation occurs which causes squirrels to have white coats, and squirrels with this characteristic have a better chance to survive and produce offspring
evolution produces squirrels which age more rapidly and have white coats
natural selection caused genetic changes to appear in the population, resulting in squirrels with white coats
polyploidy occurs causing white coats in squirrels and these squirrels are more fertile and produce more offspring