Other things constant, a ________ in price will ________ the ________ for a good

Which of the following would likely cause the dollar to appreciate?

a) Rising interest rates in the United States. b) An increase in United States citizens' preference for foreign goods. c) Income growth of the United States exceeding that of other countries. d) Rising inflation in the United States.

If a natural monopoly regulatory commission sets a price where marginal cost is equal to demand

A) the firm would earn monopoly profits. B) the firm would incur a loss. C) economic efficiency would not be achieved. D) the firm would break even.