Before World War II,the Arbitrator's Decision Largely Relied On

Before World War II,the arbitrator's decision largely relied on:

A) Criminal convictions under the National Arbitration Act of 1902.
B) The National Labor Relations Board for enforcement.
C) Diplomatic and persuasive abilities to convince the parties that the decision should be accepted.
D) Public opinion.
E) The National Labor Relations Board for enforcement and criminal convictions under the National Arbitration Act of 1902.