What is Macbeth's reaction to the witches' prophecy of his future? A. He is upset that Banquo also heard the prophecy because he thinks that Banquo will figure out that Macbeth is going to kill the king. B. He is excited at the prospect of becoming king but also fearful about what role he will have to play in making it happen. C. He is fearful of the witches' powers and tries to warn King Duncan that his life is in danger. D. He is sad that he will not inherit the throne but happy that his son will one day be king.