Assume GDP is $19 billion. If consumer spending is $8 billion, financial investment is $2 billion, investment spending is $5 billion, business inventories are $3 billion, and government spending is $5 billion, then net exports must be equal to
A. $1 billion.
B. $2 billion.
C. -$2 billion.
D.$4 billion.
E. -$4 billion.