Use the Following Graph to Answer the Following Questions

Multiple Choice

Use the following graph to answer the following questions.This graph depicts an economy where aggregate demand has decreased,with no change in either short-run aggregate supply (SRAS) or long-run aggregate supply (LRAS) .

-During the Great Depression,the aggregate price level fell by 20 percent as depicted in the graph,suggesting that

A) both aggregate demand and long-run aggregate supply decreased during the Great Depression.
B) the primary cause of the Great Depression was a decrease in aggregate demand.
C) aggregate demand decreased and long-run aggregate supply increased during the Great Depression.
D) aggregate demand decreased and short-run aggregate supply increased during the Great Depression.
E) long-run aggregate supply increased,whereas short-run aggregate supply decreased during the Great Depression.