The Table Below Shows Government Purchases (G),net Tax Revenues (T),and

The table below shows government purchases (G) ,net tax revenues (T) ,and debt-service payments (iD) over a 4-year period for a hypothetical economy.All figures are in billions of dollars.Assume the stock of debt at the end of 2012 is $500 billion.
TABLE 31-1
-Refer to Table 31.1.What is the budget deficit in 2015?

A) -$24 billion
B) $24 billion
C) -$3 billion
D) $3 billion
E) $21 billion