Respuesta :
It would be Nation A, which after having erected trade barriers against it by Nation B, then puts up trade barriers against Nation B in response.
What constitutes a trade war?
It occurs as a result of retaliation from one country to another in the economic context, such as the imposition of stricter legislation, or bureaucracy to hinder trade, such as increased tariffs and restrictions.
Therefore, trade wars can be a result of a country's protectionist policies, and can influence a country's economy and foreign relations.
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