Which of the following did NOT occur after federal troops moved out of the South and stopped enforcing African American rights and liberties? a. Jim Crow Laws were put in place. b. Segregation became the law. c. Black Codes were put in place. d. Violence and racism increased.

the second significant cause of the great migration was the desire of black southerners to escape segregation, known euphemistically as jim crow. rural african american southerners believed that segregation - and racism and prejudice against blacks - was significantly less intense in the north.

i believe the correct answer is b.