The Text Suggests That Constraints on Federal Action Weakened or Disappeared

The text suggests that constraints on federal action weakened or disappeared altogether as a result of

A) altered interpretations of the Constitution by courts.
B) the extension of important provisions of the Bill of Rights to the states.
C) greater access to the federal courts for citizens.
D) the Supreme Court's granting Congress the power to give broad discretionary powers to administrative agencies.
E) all of the above.