Which of the following statements about a monopolist is least accurate（）

A. A profit-maximizing monopolist will expand output until marginal revenue equals marginal cost.

B. A profit-maximizing monopolist will supply less of his product than the amount consistent with the conditions of ideal static efficiency for an economy.

C. A monopolist will always be able to earn economic profit.

命令统一原则，的内容的说法正确的是？（）

A、命令的精神要一致

B、命令要逐级发布

C、避免多头指挥

D、监督不等于命令