Refer to the above diagram, where Sd and Dd are the domestic supply and demand for a product and Pc is the world price of that product. With a PcPt per unit tariff, the quantities sold by foreign and domestic producers respectively will be:

a. xz and x.
b. xv and xz.
c.  wy and w.
d. x and xz. 


c.  wy and w.