Which of the Following Is a Good Description of the "Strategic

Which of the following is a good description of the "strategic cooperation" hypothesis in public goods games?

A) Self-interested players mimic tit-for-tat players at the outset and then bail out over time as the final period approaches.
B) Players need time to figure out the dominant strategy in the game.
C) One way of getting conditional co-operators to cooperate more is to create optimistic beliefs.
D) Creating more optimistic beliefs makes it easier for players to coordinate to the payoff dominant equilibrium.