When Duopoly Games Are Repeated and a "Tit for Tat

When duopoly games are repeated and a "tit for tat" strategy is used,

A) the competitive outcome is more likely to be reached than when the game is played once.
B) the monopoly outcome is more likely to be reached than when the game is played once.
C) both firms begin to incur economic losses.
D) one firm goes out of business.
E) Because the game is repeated,it is impossible to predict whether the competitive or the monopoly outcome is more likely.