Answer:
A tariff is a tax imposed on imported goods by a country's government. In the case of foreign-made trucks, the tariff would be added to the price of the trucks when they are sold in the United States. This means that the cost of the trucks would be higher than they would be without the tariff. The salesperson is correct in saying that the higher price is due to the US tariff placed on foreign-made trucks. So, the correct answer is "It is added to the price of foreign-made trucks sold in the US."