What impact did the knights of labor have on the american labor union?

Knights of Labor (KOL), the first important national labour organization in the United States, founded in 1869. Named the Noble Order of the Knights of Labor by its first leader, Uriah Smith Stephens, it originated as a secret organization meant to protect its members from employer retaliations. Secrecy also gave the organization an emotional appeal

a. the ku klux klan

they were aganist african americans and did some bad things to them : ( hope this

the answer for 3 is b and the answer for 4 is d