a. He returned it to the original land owners
In his Reconstruction Plan, President Johnson was focused on pardons including on the land owners that had participated in the Civil War. This is because his plan gave the white South a free hand in regulating the transition from slavery to freedom with the blacks being left out
The answer you are looking for is the third one!
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Concurrent powers are powers that are shared by both the State and the federal government. These powers can be exercised simultaneously within the same territory and in relation to the same body of citizens. These concurrent powers including regulating elections, taxing, borrowing money and establishing courts.