Use the following graph to answer the next question. In the diagram, the economy's short-run AS curve is line ________ and its long-run AS curve is line ________.

The amendment to the U.S. Constitution that granted the federal government the authority to collect income taxes was the

A. 8th. B. 26th. C. 28th. D. 16th.

According to Chamberlin, the fact that in the long run average total cost exceeds its minimum value under monopolistic competition is

A. part of the cost of producing different products for consumers. B. the social cost of monopolistic competition. C. actually beneficial because it makes adjustments easier when demand increases. D. the most important reason for why monopolistic competition is not efficient.