【单选题】Assume the United States adopts a tariff quota on steel in which the quota is set at 2 million tons, the within-quota tariff rate equals 5 percent, and the over-quota tariff rate equals 10 percent. Su...
A.
The U.S. government only
B.
U.S. importing companies only
C.
Foreign exporting companies only
D.
The U.S. government and either U.S. importers or foreign exporters