How did the methods used by railroad workers to protest their working conditions compare with the tactics employed by the greenbackers, who also sought reform?

Their methods converged on the fact that both movements held riots. Since they wanted reduce the middle men power once the conditions were unfair, they held protest and raised unions to accomplish what they wanted. Railroad companies used government grants and subsides to build but charged uneven rates, which were only beneficial for big manufacturers.

the answer to your question is c