Answer:
The correct answer is letter "A": an infant industry.
Step-by-step explanation:
The infant-industry theory proposes that domestic industries, moreover those that have just started operations, need protection from the government so they can compete with foreign rivals. The protections would come in the form of tariffs and quotas passed to imports. It is one of the approaches that justify protectionism in the trade between nations but do not consider the potential effects it carries which end up in trade war.