MC ATC MR g hj Output 39. Refer to the above diagram. Equilibrium price is: С.С. D. b 40. Refer to the above diagram. This firm's demand and marginal revenue curves are based on the assumption that: A. the firm has no immediate rivals. B. rivals will match both a price increase and a price decrease. C. rivals will match a price increase, but ignore a price decrease. D. rivals will ignore a price increase, but match a price decrease.