after the passage of the 13th, 14th, and 15th amendments, why did African-Americans continue to experience political oppression?

a. The amendments were not intended to exclusively solve African-American problems.
b. Southern legislators enacted Jim Crow laws.
c. Many African-Americans did not trust that the amendments would be upheld.
d. Poor communication kept African-Americans from learning about their rights.

b. Southern legislators enacted Jim Crow laws.