If a Player Has a Grim Trigger Strategy, That Player

Multiple Choice

If a player has a Grim Trigger strategy, that player:

A) becomes pessimistic if any other player gains an advantage that the player does not share in.
B) becomes hostile if she is the only player left in the game.
C) is serious and firm in her quest to do whatever it takes to succeed, particularly if opposition from other players rises.
D) cooperates if other players have cooperated in all previous rounds but defects if any player ever defects.