What does Washington warn will happen if whites don't work with African Americans for the bettering of the South?

A. At least 90% of the black population will move to the northern industrial cities.
B. The South will experience a new and deadlier "second civil war."
C. They will prove to be a "body of death" pulling the South down with ignorance and crime.
D. Blacks will do it themselves and will bypass the whites in progress and wealth.