"My love is such that rivers cannot quench." sounds correct.
I know this may start controversy but it's not oppressed if they don't know they're oppressed. But if being abused then let them free yes, but on the terms of being oppressed then no.
Answer:
C) Incidentally
Explanation:
Personally I don't like any of these answer choices. However, this one makes the most sense in this context. The others would need a much different set-up earlier on in the passage. "Incidentally" does not require such a set up, which is why it is the only one that fits.
C it resolves the main conflict of the story