Answer:
The correct answer is the option C: changes in M in the short run can cause Real GDP to fall.
Explanation:
To begin with, the monetarist economists are the one that support the idea of not having any intervention from the government regarding the economy and moreover they are the ones whose ideology focus mainly in the money, as it name indicates. Therefore that when the government decides in the short run to increase the amount of the money supply then the monetarists argue that the action done by them will cause the Real GDP to fall because of the high inflation that it will cause the increase of the money supply and consequently low demand, etc.
