Which of the Following Statements Is True of the Federal

Which of the following statements is true of the federal court system in the United States?

A) On the lowest tier of the federal court system are the U.S. district courts.
B) The number of judicial districts in the United States has been fixed at forty.
C) The federal court system is a two-tiered model.
D) The District of Columbia does not have its own federal court system.
E) There are a total of fifty five court systems in the United States.