Which of the Following Best Describes "Game Theory" as It

Which of the following best describes "game theory" as it applies to animal behavior?

A) The fitness of a particular behavior is influenced by other behavioral phenotypes in a population.
B) The total of all of the behavioral displays, both male and female, is related to courtship.
C) An individual in a population changes a behavioral phenotype to gain a competitive advantage.
D) The play behavior performed by juveniles allows them to perfect adult behaviors that are needed for survival, such as hunting, courtship, and so on.
E) The evolutionary "game" is played between predator and prey, wherein the prey develops a behavior through natural selection that enables it to be less vulnerable to predation, and the predator counters with a new reciprocal predatory behavior.