If the Bank of Canada wants to influence real economic variables in the short run, it uses

Select one:

a. its only policy instrument-the overnight interest rate target-to influence aggregate demand.

b. policy instruments such as the exchange rate and investment to influence the economy.

c. policy variables such as the exchange rate and investment to influence aggregate demand.

d. policy variables such as the money supply to influence investment and aggregate supply.

e. policy variables such as open-market operations to influence aggregate demand.