Based on the Phylogeny of the Galapagos Finches, Which Statement

Based on the phylogeny of the Galapagos finches, which statement is correct?

A) Eating insects is a key innovation.
B) The ancestor of the small tree finch and large tree finch probably ate insects.
C) The ancestor of the large cactus finch and common cactus finch likely ate insects.
D) The small tree finch is most closely related to the sharp-beaked finch.