Question

Imposing some sort of cost on trade that raises the price of the traded products is MOST LIKELY an example of A) a trade barrier. B) a trade surplus. C) a trade deficit. D) a trade incentive.

Answer 1

A trade surplus or trade deficit (answers B and C) refer to the relationship between the exports and imports and not to the cost on trade. 
A trade incentive is something that encourages the trade cost on trade is not an incentive. 
The correct answer a trade barrier.