D) Macbeth is torubled by the witches' prophecy that Banquo's descendants will become kings.
E) Macbeth has a troubled conscience because he murdered Duncan and Banquo
Explanation:
During the banquet, Macbeth is informed that Banquo has been murdered as he ordered, but his son Fleance escaped, so the witches' prophecy can still be fulfilled. Also, consumed by guilt and a troubled conscience, he sees Banquo's ghost around him during the banquet, leaving him paranoid and despaired.