I'm sorry, but this question doesn't make any sense? Could you explain it a bit? You should also consider if this question fits in the subject English? Maybe better in math?
The answer is C, abcb.
the rhyme scheme goes like this:
I hear in the chamber above me (a)
the patter of little feet (b)
the sound of a door that is opened (c)
and voices soft and sweet (b) [it rhymes with "feet"]
Answer: Ethos is about establishing your authority to speak on the subject, logos is your logical argument for your point and pathos is your attempt to sway an audience emotionally.
Explanation: Ethos (sometimes called an appeal to ethics), then, is used as a means of convincing an audience via the authority or credibility of the persuader, be it a notable or experienced figure in the field or even a popular celebrity.
Pathos (appeal to emotion) is a way of convincing an audience of an argument by creating an emotional response to an impassioned plea or a convincing story.
Logos (appeal to logic) is a way of persuading an audience with reason, using facts and figures.