Answer:
Macbeth's vision of Banquo's ghost shows about Macbeth's state of mind:
B. That he feels guilty about having Banquo killed.
Step-by-step explanation:
It was because of the guilt that Macbeth sees the ghost of Banquo in the dining hall. Out of fear and guilt, Macbeth acted very oddly at the banquet. Macbeth planned to murder Banquo in the fear of the prophecy made by the three witches.