With Regard to the Prisoner's Dilemma,the Tit-For-Tat Strategy Cooperates on the First

With regard to the prisoner's dilemma,the tit-for-tat strategy cooperates on the first trial,and subsequently:

A) defects if the opponent invites cooperation
B) does what the opponent did on the previous trial
C) reciprocates defection but not cooperation
D) reciprocates cooperation but not defection