The slope of a production possibilities curve is based on opportunity cost.

Keynes believed which of the following?

A. The government has a role to play in fighting unemployment, but not in fighting inflation. B. The government has a role to play in fighting inflation and unemployment. C. The government has a role to play in fighting inflation, but not in fighting unemployment. D. The government does not have a role to play in fighting inflation or unemployment.

If the demand curve and the supply curve for a good are straight lines, then the deadweight loss that results from a tariff is represented on the supply-and-demand graph by

a. the area of one triangle. b. the area of one rectangle. c. the combined areas of two different triangles. d. the combined areas of two different rectangles.