Suppose in the short run the level of aggregate output in an economy decreases at the same time the aggregate price level decreases. This is most likely due to a
Select one:
a. leftward shift in the aggregate demand curve, holding everything else constant.
b. rightward shift in the aggregate demand curve, holding everything else constant.
c. leftward shift in the short run aggregate supply curve, holding everything else constant.
d. rightward shift in the short run aggregate supply curve, holding everything else constant.