In a Repeated Prisoner's Dilemma, a Player That Is Playing

In a repeated prisoner's dilemma, a player that is playing tit-for-tat will:

A) defect in the first round and defect in all subsequent rounds.
B) defect in the first round and, in any subsequent round, do what their opponent did last round.
C) cooperate in the first round and defect in all subsequent rounds.
D) cooperate in the first round and cooperate in all subsequent rounds.
E) cooperate in the first round and, in any subsequent round, do what their opponent did last round.