The correct answer to this open question is the following.
Although you forgot to include the options for this question, we can answer the following.
The plan for reconstruction that tried to allow the former Confederacy to rejoin the union the most quickly was the Presidential Plan.
The United States President Abraham Lincoln had devised a simple plan to allow an easy Reconstruction for the former Confederate states. What President Lincoln wanted was the quick reintegration of these states into the Union. So Lincoln gave them leeway to do Reconstruction at their own pace. Lincoln announced the 10 percent plan. However, radical Republicans in Congress opposed Lincoln's plan and passed the Wade-Davis Bill, also known as the 50% plan.