Answer:
Option A -- McDonald v. Chicago (2010)
Explanation:
McDonald v. Chicago (2010) is one of the best decision taken by the supreme court of United States of America, it gives right to an individual "to keep and bear arms". This was duly enacted into law during the second amendment, and well incorporated in the fourteenth amendment. It opened people eye and cleared the doubt that existed between District of Columbia and Heller, which fall within gun rights as it regard to United States.