The Distinction Between the Short-Run and Long-Run Aggregate Supply Curve

Multiple Choice

The distinction between the short-run and long-run aggregate supply curve is necessary because in the long run:

A) technology is fixed, but in the short run it changes.
B) changes in the price level do not affect the level of real GDP but do in the short run.
C) the aggregate supply curve is horizontal, but in the short run it is upward sloping.
D) the price level is constant, but in the short run it fluctuates.