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 primary budget deficit in 2013?

A) -$12 billion
B) $12 billion
C) -$6 billion
D) $6 billion
E) There is no primary budget deficit.