Which of the Following Is Generally Not True of the Arbitration

Which of the following is generally not true of the arbitration process in labor relations?

A) About half of all agreements provide for arbitration of grievances.
B) Arbitration as a last step is provided for in the agreement.
C) If one party requests the arbitration of a grievance, both must abide by the arbitrator's decision.
D) The selection of an arbitrator is specified in the agreement.