Which scenario illustrates one possible way to get a national budget surplus?

AThe amount of money the state government spends and collects in revenue is exactly what they outlined in the budget.

BThe amount of money the state government spends is lower than predicted, while the costs are exactly what were predicted.

CThe amount of money the federal government spends is higher than predicted, while the costs are exactly what were predicted.

DThe amount of money the federal government spends is lower than predicted, while the costs are exactly what were predicted.