Which of the Following Statements Is True

Which of the following statements is true ?

A) Fiscal policy is the manipulation of the nation's money supply to influence the nation's output, employment and price level.
B) Discretionary fiscal policy is the deliberate use of changes in government spending and taxes to stabilize the economy.
C) The tax multiplier is the change in aggregate demand resulting from an initial change in government spending.
D) A budget deficit exists when government tax revenues exceed government spending.