Nahshid and Senim own competing businesses and have agreed to collude to keep prices high. They both plan on being in business indefinitely (so this is an infinitely repeated game.) IF they collude,...

Extracted text: Nahshid and Senim own competing businesses and have agreed to collude to keep prices high. They both plan on being in business indefinitely (so this is an infinitely repeated game.) IF they collude, Nahshid gets a payoff of $120 now and $120 in every year going forward. But if Nahshid "cheats" he gets a one-time payoff of $130 now. Senim responds with a trigger strategy which means that Nahshid only gets $118 for every year after this. What does the interest rate have to be in order for Nahshid to continue colluding and not cheat? Select one: O a. Interest rate must be greater than or equal to 0.1, or 10%, to sustain collusion. O b. Interest rate must be less than or equal to 0.1, or 10%, to sustain collusion. O c. Interest rate must be greater than or equal to 0.2, or 20%, to sustain collusion. O d. Interest rate must be less than or equal to 0.2, or 20%, to sustain collusion.