Why Does the Hawk-Dove Model Predict Variation in Fighting Behavior

Why does the hawk-dove model predict variation in fighting behavior in a population?

A) The fitness of hawk and dove strategies are equal in the evolutionary stable strategy (ESS) .
B) The fitness of the hawk strategy is greater than the fitness of the dove strategy.
C) The fitness of the dove strategy is greater than the fitness of the hawk strategy.
D) The fitness of each strategy varies over time.
E) Because it is an asymmetric game