B.) "The governments of southern states ignored the hardships of the African American community and continued to care mainly about white citizens"(paragraph 2).
This excerpt shows that African Americans were treated unfairly in the south, giving them a good reason to want to leave to Harlem. I was thinking it may be "C", but this can't be true considering Harlem was a neighborhood in New York, NY that emphasized Jazz music and night life rather than factory work.