It shows the readers that not all slave-owners was cruel.
I am pretty sure it is C. Exposition because the scene is explaining background information on why the Captain was injured.
The answer could possibly be B though as the author seems to be starting the story with the injured captain as the climax...
https://4agoodcause.com/5-examples-great-fundraising-appeal-e-mails/
https://4agoodcause.com/5-examples-great-fundraising-emails/
Hope these help. Good luck.
Answer:to clearly communicate expectations
Explanation: