Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

According to the theory of money neutrality, money supply growth does not affect variables such as real output and employment in:
Option A:the long run.
Option B:the short run.
Option C:the long and short run.

Answer: A