Final answer:
The European Union's terms of trade will get worse and the quantity of imports will decline.
Step-by-step explanation:
The correct answer is D. The European Union's terms of trade will get worse and the quantity of imports will decline.
When the European Union places a tariff on clocks, it creates a barrier to trade. This makes clocks more expensive for consumers within the European Union, which reduces the demand for imported clocks and encourages them to buy domestically produced clocks. As a result, the quantity of imports of clocks will decline.
The terms of trade refer to the ratio at which a country can trade its exports for its imports. When the European Union places a tariff on clocks, it reduces its capability to trade its exports (other goods and services) for imports of clocks, making its terms of trade worse.