Question

how does the third - person limited narrator create a sense of irony when the police eat the murder weapon?
the narrator shifts the focus to the detectives’ investigation, making the reader believe they will catch mary.
the narrator lets the reader know something the police do not, adding a layer of dark humor to the scene.
the narrator focuses on mary’s guilt, making the police look incompetent.
the narrator reveals everything the police think, making them seem overconfident.

Explanation:

In the story (likely "Lamb to the Slaughter"), the third - person limited narrator knows Mary's secret (the murder weapon is the leg of lamb) while the police do not. The narrator reveals what the police don't know, and when the police eat the murder weapon (the lamb), the reader, who knows the truth, sees the irony. The option "The narrator lets the reader know something the police do not, adding a layer of dark humor to the scene" fits this. The other options: shifting to detectives' investigation doesn't create irony directly; focusing on Mary's guilt isn't the main irony source here; revealing police thoughts doesn't create the irony of them eating the weapon.

Answer:

The narrator lets the reader know something the police do not, adding a layer of dark humor to the scene.