Read the passage. Then answer the question.
In Shakespeare’s play Hamlet, the title character confronts a situation that seemingly leaves him paralyzed and unable to act decisively. At night on the battlements of Elsinore Castle, Hamlet is visited by his father’s ghost, one of literature’s great spirits with an axe to grind. The ghost solemnly explains how he was murdered by his own brother, the man who now sits on his throne, wears his crown, and has married his widow. Hamlet is charged by his father’s spirit with the awesome task of bloody revenge.
Which of the following is not appropriate to the overall tone of this passage?
The colloquial expression with an axe to grind, meaning to have a grievance against someone, is more suitable to informal writing.