Buffleheads who defend territories might have two strategies: aggressive or defensive. Aggressive buffleheads intrude on other territories and incur higher costs, but also greater benefits, than defensive buffleheads. What is the evolutionary stable strategy (ESS) for the pavoff matrix below? a. Pure defensive b. Pure aggressive c. Mixed aggressive and defensive d. The ESS cannot be determined from this matrix e. The ESS depends on the frequencies of aggressive and defensive.