Concept:A quota is a government limit on the quantity of a good that can be imported or exported in a given period.Explanation:The country may import only a fixed amount of rice each year: 50,000tonnes.This limit is based on quantity, not on price or tax.Devaluation lowers the currency's value, a tariff is a tax on imports, and an embargo is a complete ban.Therefore, this restriction is an import quota.Answer:D. Quota