Which of the Following Is True of the Federal Arbitration

Which of the following is true of the Federal Arbitration Act?

A) It covers any arbitration clause in a contract that involves interstate commerce.
B) It favors litigation over arbitration in cases where an arbitration clause is ambiguous.
C) It nullifies the rights of parties to litigate disputes if an arbitration clause exists.
D) It ensures that arbitration is used only in federal cases, and not in state cases.
E) It guarantees that all arbitration clauses are irrevocable under any circumstances.