If a monopolist earns positive economic profits in the long run,

A) new firms will enter the market.
B) the monopolist expands production.
C) the industry supply curve shifts to the right.
D) the monopolist will not change its behavior.

Economic Profits

Profits exceeding the opportunity costs of all resources used in production, indicating the firm is earning more than the minimum required to stay in business.

Monopolist

A single seller in a market who has significant control over the supply and price of a particular product or service.