Answer:
Gray Market.
Explanation:
Gray market refers to unauthorized marketing or trade. In business, the term gray (or grey) market is used to define the trading of goods and products that have been done unofficially, which means that has not been permitted officially. It may be legal but not official. It is also known as the over-the-counter market. In simple terms, when a good or product is sold without the permission of the brand owner, it is known as the grey market.
In the given case, the trading of Japanese tractors is unauthorized as they are sold without any authorized channels in the U.S. market.
Thus the correct answer is a grey market.
