An import quota is a nontariff trade barrier that。

An import quota is a nontariff trade barrier that。
A.places a percentage tax on certain imports.
B.places a specific dollar amount of tax on certain imports.
C.rewards firms for meeting or exceeding their sales quotas.
D.places a limit on the quantity of goods that may be importeD.
正确答案：places a limit on the quantity of goods that may be imported.