The Level of Potential Output Is Treated as a Long-Run

The level of potential output is treated as a long-run aggregate supply:

A) because the long run is the time required for adjustment in wages and prices to their equilibrium values.
B) because it appears only once every 100 years.
C) because it reflects money illusion on the part of either households, business or government.
D) because the economy cannot operate at potential output in the short run.