Answer:
The answer is b. The ending of slavery
Step-by-step explanation:
W. E. B. Du Bois was one of two main advocates for Negro rights, besides Booker T. Washington. He fought against the Ku Klux Klan terrorism and supported removal of the racial-segregation laws had basically taken over the south in the 1890s. Obviously, the choice a and c is not relevant. The choice c. Booker T. Washington's Tuskegee Institute is certainly incorrect because Du Bois criticized Washington’s acceptance of racial segregation in education because he felt that it only encouraged whites to deny African American rights.