Although Millions of Prairie Chickens Once Occupied Illinois, in 1993

Although millions of prairie chickens once occupied Illinois, in 1993 only 50 remained. Starting in 1992, scientists moved almost 300 prairie chickens from large populations in other states to Illinois to _____ Illinois prairie chicken populations.

A) prevent the development of nonheritable mutations in
B) introduce genetic variation back into
C) induce stabilizing selection in
D) cause genetic drift in