Which of the Following Is True of a Nash Equilibrium

Multiple Choice

Which of the following is true of a Nash equilibrium?

A) At least one of the players need to have a dominant strategy to arrive at a Nash equilibrium.
B) In a Nash equilibrium,one player has an incentive to change his strategy in order to increase his profit.
C) Each player's strategy in a Nash equilibrium is the best possible strategy given the strategy of the other player.
D) In order to arrive at a Nash equilibrium,it is necessary for both players to credibly commit to a course of action.