Broadly Speaking, What Was the Effect of the 2013 Supreme

Broadly speaking, what was the effect of the 2013 Supreme Court decision Shelby Co. v. Holder?

A) The Court ruled that Obama's signature healthcare law violated the commerce clause of the Constitution, protecting individuals and states from adhering to the law, thus limiting federal power.
B) The ruling expanded federal power by extending the commerce clause to include the national government's authority to restrict gun laws.
C) The Court used the necessary and proper clause to rule that Congress could establish a national bank.
D) By invalidating parts of the 1965 Voting Rights Act, the Court freed some states with histories of racial discrimination from federal oversight in elections.
E) The ruling limited the power of the national government by establishing a precedent that Congress could not regulate commerce between states.