Macbeth’s degenerating mental state becomes apparent in this scene.
Explanation:
Macbeth has just ordered some men to murder his friend Banquo, Macbeth had him murdered because he wants to become knig of Scotland. This action has been conditioned by the witches' prophecies and Macbeth 's influence on reality. He has been doing all he can to make reality serve his ambition. Yet, he has become so obsessed about power that his mental health gets unbalanced. This is evident when during the banquet he sees Banquo's ghost .
The correct answer for this would be the first and last option. In Act III of Shakespeare's Macbeth, the two statements that correctly state the significance of the banquet scene are the following: Macbeth’s degenerating mental state becomes apparent in this scene; and <span>Macbeth realizes that the murderers were unable to kill Banquo because he was present at the banquet. Hope this answer helps.</span>