The Managers of Alpha and Beta Must Make Repeated Advertising

The managers of Alpha and Beta must make repeated advertising decisions simultaneously at the beginning of every month. They choose either low or high levels of advertising expenditure. They both employ a discount rate of 2.5 percent per month. Use the payoff table shown below to answer the next five questions.
-Beta expects punishment to last for two months after being caught (i.e., to be penalized in months 2 and 3) . What would be the value-maximizing decision for Beta?

A) Cooperate since $3,000 > PV_{Benefits of cheating.}
B) Cooperate since $6,500/(1.025) > PV_{Benefits of cheating.}
C) Cheat since PV_{Benefits of cheating.} > $2,820.
D) Cheat since PV_{Benefits of cheating} < $5,641.