In both perfect coTo maximize total surplus with a monopoly firm, a benevolent social planner would choose the level of output where a. MC intersects the demand curve. b. MR exceeds MC by the greatest amount. c. MR = MC. d. MR intersects the demand curve.mpetition and monopolistic competition, each firm a. has some monopoly power. b. sells a product that is at least slightly different from those of other firms. c. faces a downward-sloping demand curve for its product. d. has many competitors