The Supreme Court Ruling United States V

The Supreme Court ruling United States v. Lopez (1995) overturned a law banning firearms in and around schools because

A) Congress had overstepped its authority in a matter that should be decided by the states.
B) Congress had made a law that was unenforceable except by using federal resources.
C) Congress had used the commerce clause for its argument and it should have used the elastic clause.
D) Congress had used the commerce clause for its argument and it should have used its enumerated powers.
E) the law was passed to appease Congress' constituency, but did not actually work.