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. Suppose the U.S. imports 1 million tons of steel. The resulting revenue effect of the tariff quota would accrue to:（  ）
选项：

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