The correct option is E beginning of Congressional Reconstruction.
Passage of the Reconstruction Act of 1867 signaled the beginning of Congressional Reconstruction. In 1866, many Americans felt that the Union had not been adequately reconstructed, that the way freedom had been defined for black Americans was not adequate. As a result, a majority Republican Congress was elected and pushed for the passage of the Reconstruction Acts of 1867, which enacted the plan that became known as Radical Reconstruction.