Income distribution in the United States has become more equal since 1980

Which of the following statements is not correct?

a. Part of the deadweight loss associated with monopoly is measured by the monopolist's economic profit. b. Marginal cost is always less than average total cost in a natural monopoly. c. Discount coupons available free to the public are a type of price discrimination. d. Anti-trust laws make it harder for firms to create synergies.

If a country removed an import quota on cotton, then overall that country's

a. exports and imports would rise. b. exports would rise and imports would fall. c. exports would fall and imports would rise. d. exports and imports would fall.