What Was the Significance of the Railcars Connected to Pullman

What was the significance of the railcars connected to Pullman cars during the Pullman strike?

A) They allowed the strikers to create as big a disruption as possible, as they set railcars on fire and derailed whole trains.
B) They greatly increased the likelihood that Pullman would accept Eugene V. Debs's initial plea for a negotiated settlement.
C) They were used as justification for a federal intervention, as President Cleveland claimed that the strike must be ended because it interfered with the mail.
D) They allowed union leaders throughout the country to exchange correspondence during the strike, greatly shifting the odds in their favor.
E) They were a bargaining tool that Eugene V. Debs used to successfully avoid prison and go on to enjoy a private life out of the spotlight.