And then it started like a guilty thing
Upon a fearful summons
what is the simile comparing “it” to?
A. a fearful summons. B. the feeling of dead. C. a guilty person. D. a court summons

B.

"it" refers to a pronoun, specific for animals or subjects, so C. wouldn't be an option.

And "summon" in meaning of "request someone to present" in this sentence, could be put like this:

when the fearful summons going into someone's ear (we don't know who), it trigger the person to have guilty feeling and also the fear of possibly dying.

ani shes super misturious