Answer:
The correct answer is letter "D": limits the quantity of auto parts the U.S. car makers may buy from China.
Explanation:
Quotas reflect the 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 industries. By imposing a cap on imported foreign goods it limits the supply of those goods and keeps prices up so that domestic businesses can still sell their goods at a higher price.