D. Slavery is an abomination against human beings.
Explanation:
Both documents are narratives of former slaves and how they gain their freedom, and the type of life they had when they were under the orders of a master, so both documents are supporting the statement that Slavery is an abomination against human rights, from the point of view and the experience of someone that lived it in its own flesh.
I believe the answer is to introduce yourself because a reflective essay is an essay where the author reflects or examines their experiences in life. Due to what a reflective essay is, this would make the most sense.