Final answer:
Trade restrictions have various justifications, including national defense, infant industry protection, and job preservation. Fair competition and retaliation are not considered legitimate arguments for trade restrictions.
Step-by-step explanation:
Trade restrictions are policies implemented by governments to regulate the flow of goods and services across borders. There are several arguments in favor of trade restrictions, but they do not include fair competition and retaliation. Trade restrictions may be justified on the grounds of national defense, protecting infant industries, and preserving job opportunities. Another argument for trade restrictions is the protection of sovereignty rights.