Refer to the Figure Below to Answer the Following Questions

Multiple Choice

Refer to the figure below to answer the following questions. Figure 7.1.2
The figure shows the market for helicopters in Canada,where D is the domestic demand curve and S is the domestic supply curve.The world price is $36 million per helicopter.
-In Figure 7.1.2,with international trade,Canadian firms buy ________ helicopters per year.

A) 240
B) 480
C) 720
D) 360
E) 600