USA HISTORY

Detailed explanation-1: -Answer. D–the early labor movement. These names/events were associated with late 19th century-early 20th century labor movement. Haymarket Square was a strike turned riot in Chicago.

Detailed explanation-2: -Its members included low skilled workers, railroad workers, immigrants, and steel workers. As membership expanded, the Knights began to function more as a labor union and less of a secret organization. During the 1880s, the Knights of Labor played a huge role in independent and third-party movements.

Detailed explanation-3: -Most earlier unions restricted membership to skilled laborers (those with specialized training in a craft) and to white men. Led by Terence V. Powderly, the Knights welcomed unskilled, semi-skilled, and skilled workers into their ranks. Immigrants, African Americans and women were also welcome as members.

Detailed explanation-4: -The Knights of Labor was founded as a secret society of tailors in Philadelphia in 1869. It grew in size and prominence in the early days of the American labor movement from the mid-to-late-1800s and played a key role in the Great Railroad Strike of 1877.