If aggregate planned expenditure exceeds real GDP$,$ how do inventories change and how does that impact the economy?

Select one:

a$.$ Inventories increase, and as real GDP increases, the economy moves up along the $AE$ curve occurs.

b$.$ Inventories increase, and firms increase production, which shifts the $AE$ curve upward.

c$.$ Inventories increase, which shifts the $AE$ curve upward.

d$.$ Inventories decrease, and as real GDP increases, the economy moves up along the $AE$ curve occurs.

e$.$ Inventories decrease, which shifts the $AE$ curve downward.