In the Context of Alternative Male Mating Strategies, a "Sneaker

In the context of alternative male mating strategies, a "sneaker" male is a

A) species of snake that has a hemipenis.
B) female that leaves the nest at night to copulate with the dominant male.
C) male that has muted coloration, often with immature or female characteristics, that sneaks to mate with females rather than directly competing with other males.
D) male that has sexually selected brightly colored feet that attract the female's attention.