What did Harvard economist Edward Chamberlin say about the observation that a monopolistically competitive firm's average cost of production exceeds its minimum average total cost? Select one: O a. Chamberlin argued that this belief is incorrect. In his view, monopolistically competitive firms do not produce at a cost above their minimum average total costs. O b. Chamberlin argued that these higher costs represent the wastefulness of this market structure. O c. In Chamberlin's view, this is evidence that monopolistic competition uses society's resources inefficiently and in a fashion that merits government intervention. O d. According to Chamberlin, this cost difference represents the value consumers place on variety and having more choice