The Figure Given Below Shows the Macroeconomic Equilibrium of a Country

The figure given below shows the macroeconomic equilibrium of a country. Figure 10.7 Refer to Figure 10.7.What is the size of the GDP gap if potential GDP equals $3, 000?

A) $500
B) $1, 000
C) $2, 000
D) $2, 500
E) $3, 000