Short Answer: comic Relief
You have to read around this speech a little bit. Mephistopheles (a demon pretty high up in "the organization") comes in and Faustus makes the comment after all his incantations (which is above your quotation) that he (Meph) is really ugly and is better suited being an old Franciscan Friar -- not a thing you would expect a devil to be.
It's wit and an audience member would smile wryly at the comment. It is not belly shaking laughter. It is just wit, sharp and pointed. (Sort of like the devil himself).
Answer: Comic Relief
One other comment. Try fitting any other answer into those two lines. None of them will work.
Answer:
1. Just at this point of my progress, Mr. Auld found out what was going on, and at once forbade Mrs. Auld to instruct me further, telling her, among other things, that it was unlawful, as well as unsafe, to teach a slave to read.
2. He would at once become unmanageable, and of no value to his master.
Explanation:
The two sentences above show that Mr. Auld did not think that education and slavery were compatible. On learning that Frederick Douglass was now learning how to read and write from his wife, he immediately stopped her, insisting that it was not safe to teach a slave how to read and write.
He reasoned that if Douglass became literate, he would become unmanageable. He might now challenge the authority of his master and become of no use to him.
Answer:
my answer would be unbalanced sources
Explanation:
because it shows unbalanced