When the AD and SAS curves intersect at a level of real GDP which exceeds potential GDP and there is no government policy undertaken, which of the following will occur?
a The AD curve shifts rightward because the Fed decreases the money supply.
b The SAS curve shifts leftward because the money wage rate rises.
c The SAS curve shifts leftward because the money wage rate falls.
d The AD curve shifts leftward because the money wage rate rises.