I would say that the answer would be that Christianity is legal to practice. Check out the Great Controversy for more information.
The answer is Cultural Diffusion.
The correct answer for this question is "<span>It abolished slavery." The </span><span>Thirteenth Amendment to the United States Constitution abolished slavery and involuntary servitude. If it is a crime that is committed, then it is an exception. In Congress, it was passed by the Senate on April 8, 1864. It was passed by the House on January 31, 1865.</span>
Because they killed a bunch of innocent people.