People often do things due to different reasons. The option that best explains why the author chooses to include a flashback in this passage is to show how the narrator overcame his conflict with George.
Why might a writer choose to include a flashback?
Flashbacks are known to hinder or interrupt the chronological flow of the main idea or narrative. This is often down to take a reader back in time so as to known the past events that happens in a character's life.
A writer uses this kind of literary device to help readers known a lot better and understand present-day elements in the story.
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