How does this passage show a change in macbeth's relationship with banquo?

a. macbeth used to believe banquo was his closest ally, but now he feels his friend has turned his back on him.

b. macbeth once thought banquo would become king, but now macbeth believes he will become king.

c. macbeth used to be loyal to banquo, but now he believes he must kill him to become king.

d. macbeth used to trust banquo completely, but now he has lost trust in his friend.