A tax on imports.

• A. Import Duty
• B. Revenue Tax
• C. Excise
• D. Tariff

Answer: (D)

A tariff is a tax placed on goods as they enter a country, collected at the border. This makes imported products more expensive and can protect domestic industries while bringing in government revenue. The term tariff is the standard label for a tax on imports, so it matches this concept precisely. An import duty is essentially a tax on imports as well, and in many contexts they’re used interchangeably, but tariff is the conventional term used in policy and economic discussions. An excise tax targets specific domestic goods or activities, like alcohol or tobacco, rather than international trade. A revenue tax is a broad-based levy for general government funds and isn’t tied to imports. So, the best answer is tariff because it most accurately and officially describes a tax on imports.