Question

the thirteenth amendment
18
amendment xiii

1. neither slavery nor involuntary servitude, except as a punishment for crime whereof the party shall have been duly convicted, shall exist within the united states, or any place subject to their jurisdiction.
2. congress shall have power to enforce this article by appropriate legislation.

gave freed slaves the right to vote.
banned secession.
abolished slavery.
allowed southerners back into the union.

Explanation:

The 13th Amendment to the U.S. Constitution abolished slavery and involuntary servitude, except as punishment for a crime. It does not give freed - slaves the right to vote (15th Amendment did that), does not ban secession, and does not allow southerners back into the Union.

Answer:

abolished slavery.