Figure 32-6 Refer to This Diagram of the Open-Economy Macroeconomic Model to Model

Figure 32-6
Refer to this diagram of the open-economy macroeconomic model to answer the questions below.

-Refer to Figure 32-6. Which of the following shifts show the effects of an import quota?

A) shifting the middle supply curve in panel c to the one to its left.
B) shifting the demand curve from the right to the left in panel c.
C) shifting the demand curve from the left to the right in panel c.
D) None of the above is correct.