During years 1870 to 1900 labor and management battled for control over wages and working conditions -1 governmental policy or practice contributing to this conflict - 1 cultural or intellectual movement contributing - 1 new piece of evidence - 3 different challenges farmers contended with from 1875-1900 - 1 20th-century impact of the challenge on u. s. government policy or american society

The correct option is " cultural or intellectual movement contributing"

Between 1850 and 1880, the emergence of modern national and industrialized states such as Italy, Germany and France. Within this period the most important characteristics of the second half of the nineteenth century are produced in terms of the workers' movement: in the first place the scientific socialism of Marx and Engels arises, thus giving the necessary theoretical foundation at times when modern Parliaments arise in the different capitalist countries of Europe. In relation to this, the socialist doctrines began to create class parties, (exclusively labor) with the name of Social Democratic Party (with personalities such as Kautsky in Germany in 1890 or Lenin in Russia in 1900).

- "schenck v. united states, case in which the u.s. supreme court ruled on march 3, 1919, that the freedom of speech protection afforded in the u.s. constitution's first amendment could be restricted if the words spoken or printed represented to society a “clear and present danger.” "

- speech aimed to potentially create danger could be banned.

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