One
All three are correct. That is what the word that has been bolded means.
Two
You could say that snores sounds like what it is (onomatopoeia), but you would be missing what this is really about. It's not A.
There is nothing repeated in there that is dominant so it is not B. (The most it could be would be a vowel sound. Even that is not obvious)
I think hyperbole is your second best answer. There is a bit of imaginative exaggeration in the comparison between the snoring lady and the cherubs doing the chores. But it is not your best answer. Reluctantly I wouldn't choose C even though I like the idea of the poem very much.
It's not a simile. Nothing is being compared.
It's D. What the snoring woman thinks is contracted and made paradoxical by the "reality" of what the black cherubs have to do.