The effects of the Tenure of office act was to prevent the president from removing the former Confederates in office.Therefore the correct option is (C).
The Tenure of office act was passed by the government of United States in 1867 by the congress republican in order to limit the power of the president of not removing the officer without taking the approval from the senate.
At that time, President Johnson wanted to remove the Confederate officer from his post and he did so without taking the approval from the senates. Therefore the correct option is (C).
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