Review theGreat ralroad strike of 1877

Great Railroad Strike of 1877, series of violent rail strikes across the United States in 1877. That year the country was in the fourth year of a prolonged economic depression after the panic of 1873. The strikes were precipitated by wage cuts announced by the Baltimore and Ohio (B&O) Railroad—its second cut in eight months. Railway work was already poorly paid and dangerous.

Explanation:

the answer is d. tariffs were raised by america's trading partners after the smoot-hawley tariff act, decreasing exports, and declining job rates.