单选题 Which of the following statements about a monopolist is least accurate? A. The monopolist faces a downward sloping demand curve. B. Unlike an oligopolist, a monopolist will always be able to earn economic profit. C. A profit-maximizing monopolist will expand output until marginal revenue equals marginal cost.

【正确答案】 B

【答案解析】The monopolist faces a downward-sloping demand curve. In some cases, a monopolist may be unable to sell for a profit. Price may be insufficient to cover the per-unit cost of the monopolist even when operating at the MR = MC rate of output.