Refer to the figure above. If the monopolist faces a constant marginal cost of $10, what is the optimal quantity that it should produce?

Higher personal income taxes

A) increase aggregate demand. B) increase disposable income. C) decrease aggregate demand. D) both B and C

Between 1986 and 1998 the De Beers company controlled the world diamond market. De Beers and its affiliated association of producers restricted diamond sales to maximize profits

De Beers and its association was "the only game in town" and had what is A) a cartel. B) a duopoly. C) monopolistic competitor. D) perfect competitor.