A Large Open Economy Has Desired National Saving of S^d

Multiple Choice

A large open economy has desired national saving of S^d = 1200 + 1000r^w,and desired national investment of I^d = 1000 - 500r^w.The foreign economy has desired national saving of = 1300 + 1000r^w,and desired national investment of = 1800 - 500r^w.Suppose the foreign country's government increases its spending by 300 and private saving does not change.Then in equilibrium,the foreign country has net exports equal to

A) 500.
B) 350.
C) -350.
D) -500.