19.       What happens to pricesand output when the long-run aggregate-supply curve shiftsleft?

           a.         Prices and outputboth increase.

           b.         Prices and outputboth decrease.

           c.          Prices increaseand output decreases.

           d.         Prices decrease andoutput increases.

20.       What would cause pricesand real GDP to rise in the short run?

           a.         an increase in theexpected price level

           b.         an increase in themoney supply

           c.          a decrease inthe capital stock

           d.         an import tariff