Answer:
c. An increase in government purchases
Explanation:
Note: The full question is attached below
When the real GDP is $550, the total expenditure will be $450 + $55 + $70 = $575
When the real GDP is $600, the total expenditure will be $475 + $55 +$70 = $600
Note: Graph showing total production and total expenditure is attached below as well. The economy is in equilibrium when real GDP is $600 . At this point, the economy is also in recessionary gap.
Thus, an increase in government purchases will be needed to move this economy to equilibrium at natural real GDP.