The Galapagos Islands contain 15 species of finches that mainly have different beak types and sizes. These finches evolved from a common ancestor that moved to these islands and occupied different parts of it. What was the most likely reason these finches evolved into different species?

A. They interbred with other bird species.

B. They adapted to different food sources.

C. The beaks provided a variation for survival in extreme climates.

D. The beaks prevented them from being seen by predators