The Great Railroad Strike of 1877:

a. was led by Samuel Gompers.
b. won higher wages for railroad workers.
c. did not have the support of the public at first, but as the strike (and its violence) spread, so did public sympathy for the strikers.
d. ended when the workers, who lacked organized bargaining power, returned to work.
e. began when Irish workers refused to work alongside Chinese.

D.ended when the workers, who lacked organized bargaining power, returned to work

Explanation:

Great Railroad Strike of 1877, was a result of reduction in wage of workers on Railroad work, which was caused by prolonged economic depression after the panic of 1873.

Announced by the Baltimore and Ohio (B&O), the railroad companies had taken advantage of the economic situation, with the determination to break the trade unions that had been formed by the workers before and after the American Civil War.

At the height of the struggle, the strikes was later subdued, for various reasons amongst which are:

1. The federal army did not break, by following order and staying together in the face of the militia. While the militas lacked effective leadership and coordination.

2. Despite the fears of the industrialists and the government, the workers lack organization amd methodical approach but rather spontaneous outbursts.

Hence, the moment their vituperations had run its course, so too did the revolts.

3. At some point, some of the workers, who lacked organized bargaining power, returned to work

i would say d out of common sense

d! i hope u get it ! xddd