Identify a true statement about arbitration.

a$.$ An arbitrator can assume authority to decide disputes that involve the same parties but which are not covered under the terms of the arbitration clause.

b$.$ If the parties provide, within their arbitration agreements, a clause that the decision of the arbitrator will be final, they cannot contest the arbitrator's decision under any circumstances.

c$.$ When a contract subject to the Federal Arbitration Act provides for the arbitration of disputes, the parties are bound to arbitrate in accordance with the federal statute.

d$.$ The Federal Arbitration Act provides that an arbitration clause in a contract relating to an interstate transaction is valid and enforceable but. not irrevocable.