$12.$ A Nash equilibrium

A$.$ is a pure strategy.

B$.$ is a dominant strategy.

C$.$ occurs when two players reach an impasse.

D$.$ occurs when each player chooses a strategy that yields the highest payoff given the

strategies of the other players in the game.

$13.$ A prisoners$$ dilemma game illustrates the conflict between

A$.$ law enforcement and criminals.

B$.$ the judicial system and the police system.

C$.$ law and order.

D$.$ self$-$interest and collective interests.