African Black-Bellied Seedcracker Finches Have Beaks That Are Either Large

Multiple Choice

African black-bellied seedcracker finches have beaks that are either large or small.Only large-beaked birds can crack open hard seeds,and small-beaked birds are more adept at handling small seeds.Both have an advantage over intermediate-sized beaks.This is an example of a response to:

A) directional selection.
B) stabilizing selection.
C) disruptive selection.
D) sexual selection.