Net total benefits of an activity are maximized when marginal benefits and marginal costs are equal

Aggregate demand

A) decreases if expected future income rises. B) increases if the exchange rate rises. C) increases if government expenditures decrease. D) increases if the expected inflation rate increases. E) increases if aggregate supply increases.

The figure above shows the market for annual influenza immunizations the United States. If there is NO external benefit from health care and the government does not intervene in the market, then the equilibrium price of immunizations is

A) $30. B) $20. C) $40. D) $60. E) $70.