问题如下：
Which of the following trade policy would most likely decrease domestic government revenue?
选项：
A.Export subsidy.
B.Voluntary export restraint(VER).
C.Tariff.
解释：
A is correct.
An export subsidy is a payment by the government to a firm for each unit of a good that is exported so it may decrease domestic government revenue.
考点：Trade Restrictions
解析：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。
出口补贴会刺激出口增加，以此导致国家税收增加，这部分难度不能弥补出口补贴的损失给国家增加收入吗？
