What evidence did Charles Darwin use to support his theory of natural selection?

A. Galápagos finches and mainland finches shared many common traits and were the same species.

B. Fossil records from the mainland showed that Galápagos finches and mainland finches shared a common ancestor.

C. Galápagos finches were able to pass on a variety of traits so that each generation differed greatly from its parents.

D. Galápagos finches had beak shapes that varied from island to island, according to the environmental conditions of each island.