Read this stanza from "The Raven."

Presently my soul grew stronger; hesitating then no longer,
"Sir," said I, "or Madam, truly your forgiveness I implore;
But the fact is I was napping, and so gently you came rapping,
And so faintly you came tapping, tapping at my chamber door,
That I scarce was sure I heard you"–here I opened wide the door–
Darkness there and nothing more.

How does Edgar Allan Poe create suspense in this stanza?

The darkness in the hallway foreshadows the dark bird’s entrance in the room.
The pacing is slowed down as the action of opening the door is delayed.
The source of the noise is not yet revealed, as no one is standing at the door.
The speaker believes that he has a visitor to his room, which turns out to be true.