If he enters the election and he wins the election then his payoff is B because he entered C, --sorry B because he won, C because he had to pay his election expense.

如果他参加选举并且获胜,那么他的收益是B,因为他参选,C,对不起,B,因为他获胜,C,因为他要支付选举成本

耶鲁公开课 - 博弈论课程节选