单选题 All of the following are accepted explanations of how fiscal policy can affect aggregate output except that a(n)

A、 increase in government purchases moves the aggregate demand curve to the right, increasing aggregate output if the aggregate supply curve is not vertical.
B、 increase in tax receipts moves the aggregate demand to the right, increasing aggregate output if the aggregate supply is not vertical.
C、 increase in government purchases will not affect aggregate output, but will only increase prices, if the economy is already at full capacity.
D、 decrease in tax receipts moves the aggregate demand curve to the right, because decreased tax receipts allow higher aggregate demand at each price level.

【正确答案】 B

【答案解析】