Concept:Philostrate is the officer who arranges entertainment for Duke Theseus in the play.Explanation:The extract shows Duke Theseus instructing Philostrate to stir the Athenian youth to merriments. This command clearly establishes Philostrate’s role as the person in charge of festivities. In Shakespeare’s time, this role was known as the Master of the Revels. Therefore, Philostrate is not a clown, fairy, or rival of Puck; he is the Duke’s entertainer.Answer:B. Duke's entertainer