"The moral which I gained from the dialogue was the power of truth over the conscience of even a slaveholder."

Question: Which sentence from the text most strongly supports the correct answer to Question 5? Answer choices for the above question A. “As I writhed under it, I would at times feel that learning to read had been a curse rather than a blessing.” B. “These words used to trouble them; they would express for me the liveliest sympathy, and console me with the hope that something would occur by which I might be free.” C. “The moral which I gained from the dialogue was the power of truth over the conscience of even a slaveholder.” D. “When I was sent of errands, I always took my book with me, and by going one part of my errand quickly, I found time to get a lesson before my return.”