Answer:
D. Reviewing cases from both state and federal courts.
Explanation:
The Supreme Court was established on Article III of the United States Constitution as the head of the judicial branch, and as the highest federal court. The Supreme Court was original jurisdiction in cases that involve disputes between states and has appellate jurisdiction in both federal and states courts when a case involves federal laws. The Supreme Court is also responsible for determining whether laws are constitutional or not, and as part of the check and balances system established in the Constitution, it has the power to supervise the executive and legislative branches.
