Why Did So Few African American Men Hold Factory Jobs

Why did so few African American men hold factory jobs in the United States in 1890?

A) There were almost no factories in the South,where the majority of African Americans lived at that time.
B) White-dominated labor unions generally refused to allow blacks to join and seek industrial employment.
C) Factory owners found that they could satisfy most of their labor needs with white workers,so they rejected most black applicants.
D) Black workers intensely disliked factory work and preferred agricultural or casual urban labor.