In which situation is price discrimination a rational strategy for a profit-maximizing monopolist? when there is no opportunity for arbitrage across market segmentations when the monopolist finds itself able to produce only limited amounts of output when consumers are unable to be segmented into identifiable markets when the monopolist wishes to increase the deadweight loss that results from profit-maximizing behavio Question 20 (1.5 points) (a) (b) Price MC XX MR DA Quantity OB Quantity (c) (d) Price Price X QC Quantity Quantity Which of the above four diagrams respresents a monopolistically competitive firm that is earning a positive economic profit? Diagram (a) Diagram (b) O Diagram (c) O Diagram (d)