How does an adaptation where the ghost and Hamlet are played by the same actor differ from an adaptation where the ghost and Hamlet are played by two separate actors? O By having the same actor play both parts, the existence of the ghost is proven and Hamlet's madness is confirmed. O By having the same actor play both parts, the need for vengeance is emphasized and Hamlet's lack of madness is confirmed. O By having the same actor play both parts, the two characters are separated and Hamlet's lack of madness is confirmed. O By having the same actor play both parts, the two characters become one and Hamlet's madness is confirmed.