From the National Income Identity in the United States, If

From the national income identity in the United States, if NX < 0, this must equal the:

A) additional borrowing the United States does to finance the gap between investment and domestic savings
B) additional lending the United States does to finance the gap between investment and domestic savings
C) additional lending the United States does to earn a return on its excess savings
D) federal government's budget surplus
E) additional borrowing the U.S. federal government does to finance its budget deficit