Answer:
The correct answer is letter "D": imposing a quota on sugar imports.
Step-by-step explanation:
Quota means limits on the number of goods that can be imported into, or exported from, a nation over a certain period. Countries make use of quotas to protect domestic firms. The sugar-import quotas imposed in the U.S. are considered a burden since it implies raising the price of candy which eventually will be paid out of the consumers' pockets.