单选题 A monopolist will expand production until: A. P = MC and the price of the product will be determined by the MC curve. B. MR = MC and the price of the product will be determined by the demand curve. C. P = MR and the price of the product will be determined by the ATC curve.

【正确答案】 B

【答案解析】A monopolist will expand production until MR = MC. The demand curve lies above the intersection of the MR and MC curve and the price charged is the price on the demand curve for the output where MR = MC.