C) highlighting each pattern in a different color and noting questions using the same color ink
I believe it may be c,because interior monologue is a character's inner thoughts.
Since we are discussing sensory details, we are using all of our senses as Poe gives a word picture. Of course the only thing he doesn't do is taste it but he does everything else. He sees it, he hears it hissing, he feels the vibration, he smells its acrid breath.
