Final answer:
None of the listed strikes was a major victory for the unions. The Pullman Strike and the Homestead Steel Strike both ended with significant setbacks for the labor movement and reduced public support for labor strikes.
Step-by-step explanation:
None of the options provided, A) Great Railroad Strike of 1877, B) Homestead Steel Strike, or C) Pullman Strike, was considered a major victory for the unions. Both the Homestead Steel Strike of 1892 and the Pullman Strike of 1894 significantly weakened the labor movement and resulted in the lowering of public opinion towards labor strikes. The Pullman Strike particularly was quashed by the federal government's intervention, which sent in the army to stop the strike, resulting in the strike ending with no labor gains.
In the case of the Homestead Strike, workers at Andrew Carnegie's Homestead, Pennsylvania, plant were met with violence and ultimately defeat. Management anticipated the workers' strike and were prepared with stockpiled goods and Pinkerton agents to protect replacement workers. Ultimately, the workers had to accept reduced pay and the elimination of their union.