Why Did the Supreme Court Rule That the Religious Freedom

Why did the Supreme Court rule that the Religious Freedom Restoration Act was unconstitutional?

A) The Court argued that the Constitution forbids the establishment of official or unofficial religions.
B) The Court argued that peyote smoking is illegal,even if it is for religious reasons.
C) The Court argued that Congress had violated the separation of powers principle.
D) The president did not formally sign the act.
E) The Court argued that the act unnecessarily limited an individual's right to believe and practice whatever religion he or she chooses.