We recognize that peaceful industry is necessary to successful civilized life, but the right to strike and the preparation to strike is the greatest preventive to strikes. If the workmen were to make up their minds tomorrow that they would under no circumstances strike, the employers would do all the striking for them in the way of lesser wages, and longer hours of labor."
—Report on the (U.S.) Industrial Commission on Capital and Labor, 1890



In this report, Samuel Gompers is explaining the need for

A. wage labor.
B. freedom of contract.
C. pensions.
D. unions.