One of the major failures of Reconstruction efforts was that:
OA. maintaining martial law in the South greatly weakened the U.S.
military.
OB. the Freedmen's Bureau was taken over by Southern plantation
owners.
OC. African Americans lost their civil rights when federal troops left
the South.
OD. Congress refused to admit African Americans elected to represent
the South.

Respuesta :

The failure was the result of maintaining martial law in the South greatly weakened the U.S.military. hence option A is correct.

What were the objectives of the reconstruction process?

Restoration of the Union, reform of southern society, and adoption of progressive laws promoting the rights of emancipated slaves were the three main goals of reconstruction.

The agency was unable to implement all of its plans due to a lack of finance, Reconstruction politics, and race relations, and it was unable to provide actual racial equality or long-term protection for blacks.

Thus, option A is correct.

Learn more about the Reconstruction process:

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