Karishma is reading "The Tell-Tale Heart." She reads an excerpt, looks for clues, and makes a prediction about what happens next. Read the same excerpt and her prediction.

His room was as black as pitch with the thick darkness, (for the shutters were close fastened, through fear of robbers,) and so I knew that he could not see the opening of the door, and I kept pushing it on steadily, steadily.

Karishma predicted that the narrator would carry out the murder plot undetected.

Next, read the subsequent excerpt that Karishma read.

I had my head in, and was about to open the lantern, when my thumb slipped upon the tin fastening, and the old man sprang up in bed, crying out—"Who's there?"

Which revision is most logical for Karishma to make to her prediction as she continues to read?

The narrator will carry out the murder plot undetected.
The narrator will be seen, but not heard as the murder is committed.
The narrator will carry out the murder, challenged by the old man.
The narrator will immediately turn himself in to the authorities.

The narrator will be seen, but not heard as the murder is committed.