In act iii of shakespeare's macbeth, which two statements correctly state the significance of the banquet scene?
a. macbeth’s degenerating mental state becomes apparent in this scene.
b. lady macbeth‘s sleepwalking problem becomes evident in this scene.
c. it becomes clear that macbeth and lady macbeth are no longer partners in crime.
d. macbeth realizes that the murderers were unable to kill banquo because he was present at the banquet.