Concept:Commercial policy uses trade restrictions like tariffs and quotas to protect domestic industries.
Explanation:Restricting imports makes domestic goods more competitive in the home market.
This raises demand for locally produced goods, which increases the need for domestic labour.
As a result, local firms can employ more workers, reducing domestic unemployment.
Therefore, the main argument is to protect jobs, not to make imports cheaper, encourage non-essential imports, or achieve absolute advantage in every good.
Answer:B. reduce domestic unemployment