Economists at the U.S. Department of Justice help enforce the nation's antitrust laws

Aggregate demand is the total value of GDP that

A. all sectors of the economy are willing to purchase at various price levels, all other things unchanged B. all sectors of the economy are willing to sell at various average price levels, all other things unchanged C. consumers are willing to purchase at various average price levels, all other things unchanged D. consumers are willing to purchase at various national income levels, all other things unchanged.

The X-intercept of the budget constraint represents

a. how much of good Y can be purchased if no good X is purchased and all income is spent. b. how much of good X can be purchased if no good Y is purchased and all income is spent. c. total income divided by the price of X. d. b and c.