Which of the following is true? In a one-shot game, a collusive strategy always represents a Nash equilibrium. A subgame perfect equilibrium occurs when each player is doing the best he can regardless of what the other player is doing. Each Nash equilibrium is a subgame perfect equilibrium. Correct! Every subgame perfect equilibrium is a Nash equilibrium.

The Nash Equilibrium in a game is the outcome of which neither of the players would want to deviate from because they are making the highest payoff that they can given the other player's possible choice and leaving this outcome would result in a lower payoff.

In every subgame that is based on the original game therefore, the Nash equilibrium represents the perfect equilibrium for the players as it is giving the highest payoff given the circumstances.