Thinking of the Institutions Responsible for Advancing the Civil Rights

Thinking of the institutions responsible for advancing the civil rights of African Americans,which of the following is true?

A) Courts accomplished the work on their own.
B) Congress accomplished the work on its own.
C) Bureaucrats accomplished most of the work.
D) Congress and the courts were mutually dependent in advancing civil rights.
E) Neither Congress nor the courts accomplished much in the effort to secure civil rights for African Americans.