The correct option is D.
Lady Macbeth has the ambition to become a Queen and this led her to mastermind the killing of Duncan. Although her husband wanted to opt out of the killing scheme at the eleventh hour, she encouraged him to carry out the act. After the murder of Duncan, she become overwhelmed with guilty so much that it affect her mentality. She later regretted her action and committed suicide. Lady Macbeth was considered a tragic heroine because her morals take a turn from bad to good.
