What finally convinced the federal government to intervene in the Pullman Strike in 1894? The strike caused George Pullman to lose money. The government felt it was their responsibility to protect the workers. The strike disrupted mail delivery. The government was worried that people would stop using the rail system to travel.

The correct option is "The strike disrupted mail delivery. "

When business declined in 1894, Pullman cut jobs, wages and hours of work, but did not lower rents or prices in his city. The failure to lower rents, service fees and product prices led workers to go on strike, a violent contest that was dissolved by federal troops sent by President Grover Cleveland against the opinion of the governor of Illinois, John P. Altgeld.

A federal commission that studied the case of the 1894 strike, ruled that Pullman's paternalism was partially to blame for the problem, and defined the Pullman city as contrary to American culture. In 1898 the Supreme Court of Justice of Illinois forced the company Pullman to alienate its urban properties, annexing them to the city of Chicago. The animosity against Pullman remained, and when he died in 1897, he was buried at night in the Graceland Cemetery in a casket lined with lead with steel reinforcements in a concrete vault. Several tons of cement were poured to prevent his body from being exhumed and desecrated by labor activists.

The strike disrupted mail delivery, which angered the federal government because delivering mail is one of its key responsibilities.