Consider the following payoff matrix, which illustrates the profits in an advertising game between two firms, Firm 1 and Firm 2. Which of the following describes what happens in the Nash equilibrium of this one-shot game? Firm 2 Don't Advertise Advertise Advertise Firm 1 Don't Advertise $20k; $20k $5k; $45k $45k; $5k $35k; $35k O a. Firms realize that collective profits will be highest if neither advertises, so in the Nash equilibrium they coordinate and do not advertise. O b. While collective firm profits would be higher if neither firm advertised, in the Nash equilibrium both firms choose to advertise, resulting in the lowest possible collective firm profits. O c. In the Nash equilibrium one of the firms agrees not to advertise, so the other firm takes advantage of this to advertise and collect its highest possible individual profits. O d. While collective profits would be higher if both firms advertised, in the Nash equilibrium neither firm advertises, resulting in the lowest possible collective firm profits.