Answer:
Federal Court System.
Step-by-step explanation:
The Federal Court System is the four-tiered federal system that consists of the supreme court, circuit courts of appeal, district court, and magistrate court. This system is divided into three main level, that is, district, circuit courts of appeal, and the Supreme Courts. Each court functions differently. The lowest of the courts is the magistrate court, where cases regarding civil and criminal are heard, if not resolved they are forwarded to district court for trial. The highest among these courts is the Supreme Courts of the United States which deals with the cases that involves conflicting issues.
Thus the correct answer is the Federal Court System.