A Nash Equilibrium Is a Condition That

A Nash equilibrium is a condition that:

A) results in the highest payoff to a player regardless of the opponent's action.
B) guarantees the highest payoff given the worst possible scenario.
C) describes a set of circumstances in which no player can improve her payoff by unilaterally changing her own strategy, given the other players' strategies.
D) randomizes over two or more available actions in order to keep rivals from being able to predict a player's action.