Lee and Cody Are Playing a Game in Which Lee

Multiple Choice

Lee and Cody are playing a game in which Lee has the first move at A in the decision tree shown below. Once Lee has chosen either aggression or cooperation, Cody, who can see what Lee has chosen, must choose either aggression or cooperation at B or C. Both players know the payoffs at the end of each branch. Suppose Lee and Cody enter into a binding non-aggression agreement. As part of that agreement, they negotiate a fine that Cody would have to pay to Lee if Cody chooses aggression after Lee chooses cooperation. For the fine to be effective, it would have to be:

A) less than 15.
B) at least 15.
C) equal to 40.
D) equal to 25.