When It Comes to Social Dilemmas Such as the Prisoner's

When it comes to social dilemmas such as the Prisoner's Dilemma Game,the tit-for-tat strategy

A) employs consistent responses, independent of the partner's response.
B) is likely to elicit competitive responses from a partner.
C) involves secret verbal communications with one's partner.
D) tends to lead to losses for both partners.
E) is a means of increasing cooperation.