The correct answer is C) it required Southern states to adopt new constitutions to protect African Americans' civil rights.
The Congressional Reconstruction plan better protected the rights of African Americans than other plans in that it required Southern states to adopt new constitutions to protect African Americans' civil rights.
When President Abraham Lincoln announced the Reconstruction plan for the Southern States, it was rejected by Radical Republicans in Congress. These Republicans wanted the Southern States to be severely punished for what they did in the Civil War. They also wanted to establish a plan that required Southern states to adopt new constitutions to protect African Americans' civil rights. President Lincoln had given leeway to Southern states to do Reconstruction at their own pace and circumstances.