Final answer:
The Thirteenth Amendment abolished slavery in the United States, with the exception of people deemed criminals.
Step-by-step explanation:
The Thirteenth Amendment abolished slavery in the United States, but with one exception. It states that neither slavery nor involuntary servitude shall exist within the United States, except as a punishment for a crime that the person has been duly convicted of. So, the correct answer to your question is c) People deemed criminals.