Which statement describes how the Jim Crow system affected southern society in the late 1800's and early 1900's?

A. A new wave of radical activists migrated form the north to the south for equal rights
B. Large numbers of black Americans migrated to new colonies that had been set up in Africa
C. Black Americans were prevented from exercising the civil rights they had gained during reconstruction
D. Emancipated slaves fleeing the south led to a shortage of unskilled labor for southern farms