Final answer:
Residents of Washington, D.C. have a stronger case in challenging the ban on handguns rather than challenging the requirement to keep rifles and shotguns disassembled.
Step-by-step explanation:
Residents of Washington, D.C. might have a stronger case in challenging the ban on handguns compared to challenging the requirement that rifles and shotguns be kept disassembled. This is because the Supreme Court, in the District of Columbia v. Heller (2008) case, held that a District of Columbia handgun ban violated the Second Amendment, protecting individuals' right to keep firearms for self-defense within the home. On the other hand, the requirement to keep rifles and shotguns disassembled or bound by a trigger lock was not addressed in the Heller case and might be subject to different arguments and interpretations.