Which of the following situations in a game will result in a Nash equilibrium

a.Player 2 chooses any available strategy to her and Player 1 chooses his best response to that strategy

b.Player 1 has a dominant strategy and chooses it; Player 2 chooses her best response to Player 1's dominant strategy

c.Both Player 1 and Player 2 have a dominant strategy each and they do not choose it

d.Both Player 1 and Player 2 choose their dominated strategies