Answer: B. a tax on goods coming in from another country
Explanation: A tariff refers to a tax imposed on goods that are imported from another country. It is a policy measure implemented by a country's government to protect domestic industries, regulate trade, or generate revenue. By imposing a tariff on imported goods, the government increases their price, making them less competitive compared to domestically produced goods. This measure aims to encourage consumers to purchase domestically produced goods and support domestic industries.