The payoff matrix below shows the payoffs for Firm A and Firm B, each of whom can either "cooperate" or "cheat." The numbers in parentheses are (payoff for A, payoff for B). Firm B Cooperate Cheat Cooperate (30,30) (х,10) Cheat (10, x) (20,20) Firm A What is the minimum value for x in order for both firms' cheating to be the only Nash equilibrium? ... O A. 21 О В. 45 С. 55 O D. 40 O O O O

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