In US v. Lopez, the Court held that possession of a gun near a school
A) Is not, without more, an economic or commercial activity, and therefore, is beyond Congress' commerce power even if it substantially affects IC
B) Does not, even when aggregated with all other guns near schools, substantially affect IC
C) Does not, in an individual instance, substantially affect IC
D) Is in every instance a purely local crime, which can only be prosecuted by state authorities
Whether or not guns near schools, invidually or in the aggregate, substantially effect interestate commerce, Congress lacks the power under the Commerce clause to regulated mere possession near schools. The Court didn't totally foreclose Congress's opportunity to regulate guns near schools, but will require some showing that the activity regulated is economic or commercial in nature.
(this multiple choice question has been scrambled)