Which of the following explains the outcome and significance of the district of columbia v. heller case?
a. the supreme court decided in favor of the district of columbia, that existing laws that ban the owning and carrying of handguns are permitted.

b. the supreme court decided in favor of the district of columbia, that the second amendment allows law-abiding u. s. citizens to own and carry handguns.

c. the supreme court decided in favor of heller, that existing laws are permitted under the constitution that ban the owning and carrying of handguns.

d. the supreme court decided in favor of heller, that the second amendment allows law-abiding u. s. citizens to own and carry handguns in the district.