Step-by-step explanation:
The correct answer is: O William Shakespeare.
William Shakespeare is the author of the play "Macbeth." It is one of his most well-known tragedies, believed to have been written between 1603 and 1607. The play tells the story of Macbeth, a Scottish nobleman who becomes consumed by ambition and the pursuit of power, leading to his downfall. Shakespeare's works, including "Macbeth," are celebrated for their literary and dramatic excellence.