By the eve of World War I, the United States accounted for more than ___ of the world's industrial production. a.15% b.30% c.60% d.90%

Use the figure above to answer this question. Suppose the economy is operating at point a. A move to ________ could be explained by ________

A) point e; a decrease in the nominal interest rate B) point c; an increase in the nominal interest rate C) point d; an increase in real GDP D) point b; an increase in real GDP

In monopolistic competition in the long run, firms ________

A) make zero economic profit and require more capacity B) incur an economic loss and require more capacity C) make an economic profit and have excess capacity D) make zero economic profit and have excess capacity