Answer:
A. A tariff introduced by the Mexican government on tobacco imports from Brazil in retaliation for unfair treatment of Mexican tobacco exports to Brazil.
Explanation:
In the current scenario the Government of United States imposes taxes on import of steels as because the country was earning low revenue on foreign sales which were because of foreign trade policies of various other governments, and to assure revenue for domestic produce, imports were taxed.
Now, for this in statement A the Mexican Government imposes taxes on imports so that the unfair practice with exports of tobacco from Mexico do not create a problem in revenue of the country.
So to mitigate this scenario, the tobacoo import was taxed to assure domestic viability of the product.
Therefore, Mexican government follows the same strategy as of US Government.