Refer to the Figure

Multiple Choice

Refer to the figure.
The figure shows a matrix of fitness payoffs for interactions between two behaviorally different types of gulls: those that always fish for themselves and those that sometimes steal fish from others. P stands for the baseline fitness that a gull derives when it fishes for itself. B is the fitness gained by a thief when it steals a fish from a fish-for-self type. C is the fitness cost associated with an attempt to steal a prey.
If B were greater than C, the solitary phenotype would

A) perpetuate itself but not increase over time.
B) increase steadily over time.
C) disappear from the population over time.
D) increase until it made up 50 percent of the population.