Answer:
When he talks about duties, he talks about how he is willing to help Macbeth due to his respect to him, however, Banquo also knows that Macbeth may have done something terrible in order to become king so he also could be saying that it is his duty to stop Macbeth from committing any more crimes.
Answer: a. what the author was trying to achieve
Explanation: It's either this one of d. because what the author was trying to achieve is what the authors purpose for writing the work is and an authors work should accomplish or close to accomplish their purpose.
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