The Figure Below Shows the Aggregate Demand and Supply Curves

Multiple Choice

The figure below shows the aggregate demand and supply curves for the U.S.The figure given below shows that from the beginning of period 1 to the end of period 2:​ ​
Figure 5.1
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A) real GDP decreased and then increased.
B) real GDP increased and then decreased.
C) real GDP fell from $10,000 to $6,000.
D) real GDP rose from $6,000 to $10,000.
E) the inflation rate fell from 4 percent to 1 percent.