In my further research about the choices and their works, I would say that that the american author that has noted to their work that they supported slavery is Edgar Allan Poe. I hope you are satisfied with my answer and feel free to ask for more if you have question and further clarification.
The answer is ----D. Edgar Allan Poe------
Among the authors listed, Edgar Allan Poe is most noted for not directly addressing or opposing slavery through his works, while the others were active in advocating for abolition. Therefore, the answer to the question is D: Edgar Allan Poe. Although he did not openly support slavery, his stance was more ambivalent compared to the other authors.
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