She means that whenever they find out the truth they will turn against what they thought was right and become their allies. I would hope she became right. I don't actually know what this play is.
Explanation:
The correct answer is (D)
He wishes he could thank the young boys who taught him to read.
Answer
the organ is baroque
(I'll update as I find what the potential answers are)
The answer in my opinion is “courages”