How did slavery create a home base for african american plight.

The Emancipation Proclamation in 1863 freed African Americans in rebel states, and after the Civil War, the Thirteenth Amendment emancipated all U.S. slaves wherever they were. As a result, the mass of Southern blacks now faced the difficulty Northern blacks had confronted—that of a free people surrounded by many hostile whites

answer; /// i believe that the correct answer is (d)the huang he river valley;

d. dr. francis collins