The Best Strategy for Each Player If This Game Is

The best strategy for each player if this game is repeated is: $$\begin{array} { | l | l | c | } \hline & \text { A: Cheat } & \text { A: Collaborate } \\\hline \text { B: Cheat } & \text { A: } 1 , \text { B: } - 1 & \text { A: } - 1 , \text { B: } 1 \\\hline \text { B: Collaborate } & \text { A: } - 1 , \text { B:1 } & \text { A: } 1 , \text { B: } - 1 \\\hline\end{array}$$

A) his or her dominant strategy.
B) a mixed strategy.
C) to cheat.
D) to collaborate.