3. The third person point of view (the 'he' vs. 'I' in this passage) is voiced by an observer with limited omniscience.
In this case limited omniscience is shown by the fact that the narrator has feelings about what is occurring. An objective character would remain neutral describing events.
I think is d, because of how obvious or clear it is when you open a window or when sun shnines
Answer:
Billy, may know the two guests names and can't remember them for some reason.
The reader has direct access to the inner thoughts and feelings of Poe's narrator but not those of Mr. Hyde.