How many subgame perfect Nash equilibrium are there in the twice repeated game.

a 1

b 2

c 4

d infinitely many

In the subgame-perfect Nash equilibrium(a) of the twice-repeated game, both players Cheat

a only on the equilibrium path b only at decision nodes that are never reached c only in hypothetical situations that never happen d in EVERY possible situation and after ALL histories

Another Prisoner's Dilemma Another Prisoner's Dilemma