The Table Given Below Shows the Levels of National Income

The table given below shows the levels of national income (Y) and the corresponding levels of saving (S) , investment (I) , export (X) , and import (M) of an open economy. Table 10.2
Consider the economy described in Table 10.2.What is the equilibrium level of real GDP?

A) $935
B) $2, 100
C) $3, 320
D) $4, 800
E) $5, 230