Verified answer

If the price level falls in the U.S., things are cheaper in the U.S. and more expensive in the other countries.

So, people will buy more stuff from the U.S. (exports increase).

The U.S. will buy less stuff from other countries (imports decrease).

NX = X-I ---> net exports increase. (X increased, I decreased, bigger number than originally - smaller number than originally = bigger number)

D.