Which of the following statements about monopolies is most accurate（） A: A monopolist’s optimal production quantity is at the point where marginal revenue equals marginal cost. B: Monopolists charge the highest possible price. C: Monopolists always make a profit.

Which of the following statements is true about patents and copyrights? A: They have benefits and costs. B: They lead to higher prices. C: They enhance the ability of monopolists to earn above-average profits. D: They lead to lower prices.

Monopolists will maximize profit by producing at an output level where which of the following conditions exists（） A: Price = marginal revenue = marginal cost. B: Price = demand = marginal revenue = marginal cost. C: Marginal revenue = marginal cost ＜ price.

Which of the following statements about monopolies is most accurate? A: Monopolists charge the highest possible price. B: A monopoly structure is characterized by a well-defined product for which there are no good complements. C: A monopolist's optimal production quantity is at the point where marginal revenue equals marginal cost.