The correct answer is letter C
Johnson took over the presidency. Once at the top of the country, Johnson tried to implement his autonomy policies, against which the Republicans, who defended the Union's control over the states, vigorously rebelled. Republicans dominated Congress, imposing enormous difficulties on Andrew Johnson's administration.
Johnson continued to rebuild the former Confederate states while Congress was in recess. When Congress met in December 1865, slavery was being abolished. But the "black codes", which regulated the freed slaves, were beginning to appear.
Radical Republicans in Congress, alarmed by the restrictions imposed on blacks, acted to change Johnson's program. Refusing to accept any congressman or senator from the former Confederation, they approved measures aimed at ex-slaves. Johnson vetoed the legislation. Congress overturned its veto and passed the Civil Rights Act of 1866, establishing blacks as American citizens and prohibiting any discrimination against them.
