Answer:
In Act 3, Scene 1 of William Shakespeare's play "Hamlet," King Claudius and Polonius decide that Hamlet's erratic behavior is due to his love for Ophelia. This conclusion is drawn after they eavesdrop on a conversation between Hamlet and Ophelia, during which Hamlet appears to be acting madly and speaking in riddles.
Polonius suggests that they test this theory by arranging for Ophelia to meet with Hamlet and see if his behavior is still as erratic when he is alone with her. The King agrees to this plan, and they both leave to make the necessary arrangements.
Later in the play, it becomes clear that Hamlet's madness is not simply the result of his love for Ophelia, but is also a deliberate ploy to deceive his enemies and gain revenge for his father's murder.