The answer is: c. the narrator says he will die the following day as a consequence of his actions.
This is the beginning of the poem:
“ FOR the most wild, yet most homely narrative which I am about to pen, I neither expect nor solicit belief. Mad indeed would I be to expect it, in a case where my very senses reject their own evidence. Yet, mad am I not -- and very surely do I not dream. But to-morrow I die, and to-day I would unburthen my soul.”
When the poem is just staring the narrator is just introducing the reader to his story by telling that it can be unbelievable, however, he justify the narration in the fact that he will die the next day and for this reason he is going to unburthen his soul.