If the economy is at full employment and investment spending declines dramatically, it can lead to a decrease in aggregate demand, potentially causing a recession. To restore full employment, government fiscal policy should aim to stimulate demand.
In this case, the correct choice would be:
an excess of government expenditures over tax receipts.
This option suggests that the government would increase spending (through stimulus measures, public projects, or other forms of expenditure) relative to its tax revenue, which would help to stimulate the economy and restore full employment.