The best answer to describe the main powers and functions of the Supreme Court according to Article III of the U.S. Constitution is:
D) The Supreme Court rules on cases that involve constitutional law and federal statutes in addition to balancing powers of the federal government with judicial review.
This answer reflects the Court's role in interpreting the Constitution, adjudicating disputes involving federal laws, and exercising judicial review, which allows it to invalidate laws and actions that it finds unconstitutional.