Answer:
B. the murder of Banquo
Step-by-step explanation:
According to a different source, these are the options that come with this question:
A. the murder of Duncan
B. the murder of Banquo
C. the murder of the guards
D. the murder of Macduff’s family
The murder of Banquo is the main turning point in Macbeth. The witches' prophecy stated that Banquo's line would eventually sit on the throne, and that Macbeth would have no heirs. Macbeth worries about this prophecy, as this might mean that the only reason for him to have killed Duncan was to allow Banquo's family to reign. Therefore, Macbeth arranges for the murder of Banquo and his son Fleance, but Fleance manages to escape.