The correct answer is true.
It is true that the Thirteenth Amendment concerned the abolition of slavery.
The 13th Amendment to the United States Constitution was ratified by the necessary states on December 6, 1865. It abolished slavery in the US. From now on, slavery in the country only could be a form of punishment when someone committed a crime.
Unfortunately for Abraham LIncolsn, he couldn't witness this important moment in the history of the US because he was assassinated on April 15, 1865.
