In the Above Decision Tree,Peter Picks First and Anita Picks

Multiple Choice

In the above decision tree,Peter picks first and Anita picks second.Peter and Anita both know the payoffs to each choice for both themselves and each other.
-Refer to the decision tree above.The outcome of this game will be that

A) both will remain faithful.
B) Peter will cheat and Anita will remain faithful.
C) both will cheat.
D) Peter will remain faithful and Anita will cheat.
E) the fidelity of Peter and Anita is unknown.