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) persuasive and diplomatic capabilities of the arbitrator in forming a consensus opinion that both parties could accept.
D) public opinion.
E) the National Labor Relations Board for enforcement and criminal convictions under the National Arbitration Act of 1902.