What is the highest court in the United States?

The Supreme Court is the highest court in the United States, serving as the ultimate arbiter of federal law and the Constitution. It has the authority to review cases from lower courts, interpret the Constitution, and provide precedential rulings that guide the legal system across the nation. Established under Article III of the Constitution, the Supreme Court consists of nine justices who are appointed for life, ensuring the continuity and stability of the judiciary.

The other choices refer to different levels of the federal court system. The Court of Appeals acts as an intermediate appellate court, reviewing decisions from lower courts but does not have the final authority that the Supreme Court possesses. The District Court is a trial court where most federal cases begin, handling a variety of civil and criminal matters, but again does not have the overarching power of the Supreme Court. The Military Court deals specifically with military law and personnel, functioning separately from the civilian judicial system and not holding the highest rank in the legal hierarchy. Thus, the Supreme Court stands alone as the final decision-maker within the U.S. judicial system.