Which Choice Best Describes a Reasonable Evolutionary Mechanism for Animal

Which choice best describes a reasonable evolutionary mechanism for animal structures becoming better suited to specific functions?

A) Animals that eat the most food become the most abundant.
B) Animals that restrict their food intake will become less abundant.
C) Animals with mutations that give rise to effective structures will become more abundant.
D) Animals with inventions that curtail reproduction will become more abundant.
E) Animals with parents that continually improve their offspring's structures will become more abundant.