The Figure Above Shows the U

The figure above shows the U.S. market for airplanes, where SUS is the domestic supply curve and DUS is the domestic demand curve. The United States trades freely with the rest of the world. The world price of an airplane is $150 million.
-In the figure above,the United States ________ airplanes per year.

A) imports 500
B) exports 500
C) exports 400
D) imports 400
E) exports 200