Why Does the Amount of National Output Remain Steady in the Long

Multiple Choice

Why does the amount of national output remain steady in the long run even though the price level may change?

A) The price level has no impact on the amount of goods and services that are demanded.
B) The price level does not impact the stock of productive resources or technology.
C) Price-level changes are evidence of moving equilibriums and changing outputs.
D) When output varies, the price level must vary.