Which phrase of the Second Amendment, which was the fourth article in the original Bill of Rights, did the United States Supreme Court specifically discount in the case of District of Columbia v. Heller (2008)?

A. the security of a free state
B. a well-regulated militia
C. the right of the people
D. shall not be infringed

From Internet:

District of Columbia v. Heller , case in which the U.S. Supreme Court on June 26, 2008, held (5–4) that the Second Amendment guarantees an individual right to possess firearms independent of service in a state militia and to use firearms for traditionally lawful purposes, including self-defense within the home.

Does that help?