Discretionary spending:

Ais the difference between what a consumer spends and what the consumer saves.
Cresults in a balanced budget when the economy reaches full employment.
Bis spending which requires governmental approval on an annual basis.
Dis the amount left over for purchases of capital goods.

Verified Answer :

Discretionary spending B. IS SPENDING WHICH REQUIRES GOVERNMENTAL APPROVAL ON AN ANNUAL BASIS.

The government approval required is through its appropriations bill. It is an optional part of fiscal policy. 

In an individual's point of view, discretionary spending is money spent on non-essential purchases, these purchases are based on what they want not on what they need.