Darwin's Finches Supported the Idea of Evolution Because

Darwin's finches supported the idea of evolution because

A) Even though they changed over time, they were all still the same finch species.
B) Every continent has its own species of finch.
C) They were clearly all finches but they had adapted and changed to suit different environments on different islands.
D) They were clearly different finch species that had settled separately on different islands.
E) The finches supported the idea of natural selection, but not evolution.