问题如下：
Which type of trade restriction would most likely increase domestic government revenue?
选项：
A. Tariff.
B. Import quota.
C. Export subsidy.
解释：
A is correct.
The imposition of a tariff will most likely increase domestic government revenue. A tariff is a tax on imports collected by the importing country’s government.
考点：Trade Restrictions
解析：相比较 Tariff的税收一定归政府所有，Import quota可能被政府占有也可能被出口公司占有，所以选A不选B。
export subsidy需要政府给出口商提供资金支持，因此它会引起政府收入的减少，所C选项不入选。
这道题为什么不选择C?
