7. When the United States imposes a tariff against Canadian leather goods, it

a. limits its imports of Canadian leather goods to a specific quantity.

b. increases the difference between the U.S. price and the Canadian price of leather goods on the U.S. market.

c. reduces the difference between the U.S. price and the Canadian price of leather goods on the U.S. market.

d. disallows the importation of Canadian leather goods unless Canadians allow an equal value of U.S. leather goods into Canada.

e. disallows the importation of Canadian leather goods.