Country A places a limit on the amount of beer that can be imported into the country. Which action does Country A take in this situation?

An export subsidy is a financial support given by a government to encourage the export of goods. This action aims to promote domestic producers in foreign markets, rather than limiting imports. Since the question specifically refers to restricting beer imports, this choice does not align with the action taken by Country A.

Dumping occurs when a country exports goods at a price lower than their market value, often to gain market share in a foreign country. This practice is unrelated to the imposition of limits on imports, as it focuses on pricing strategies rather than quantity restrictions. Therefore, this option does not describe the action taken by Country A.

A tariff is a tax placed on imported goods, which raises their price and can reduce demand for those imports. While a tariff can affect the importation of beer, it does not specifically limit the quantity. Country A's action of imposing a quota is distinct from just increasing costs through tariffs.