Which called on states to desegregate "with all deliberate speed"?
a. plessy v. ferguson
b. the southern manifesto
c. brown ii
d. brown v. board of education

The correct option listed above is C. Brown II

While the Brown v. The Board of Education case ruled in the favor of Brown and called for the desegregation of schools, it did not elaborate on when and how to do this. In a later ruling, called Brown II, the Supreme Court outlined on the implementation of the results of the earlier case and said to do so "with all deliberate speed".

(I also took the test and got it right with this answer)

Hope this helps!