In The Tragedy of MacBeth, Act III, what is the cause of Macbeth’s irrational behavior at the banquet? a. too much to drink c. a sudden illness b. a lack of sleep d. his guilty conscience

The answer to the question given above is letter d. his guilty conscience In The Tragedy of MacBeth, Act III, the cause of Macbeth’s irrational behavior at the banquet is his guilty consciousness. >> The Tragedy of Macbeth is one among  the most popular of William Shakespeare's plays, as well as his shortest tragedy.