Answer:
B: to emphasize the father's determination to find help for his son.
Explanation:
The author's main purpose for including these words spoken by the father is to emphasize his determination to find help for his son, and there are some words or phrases in them that seem to express this idea, such as "..I'll find somebody to take care of you."; "..there's a doctor...I'll take you to him."; "I've carried you for hours, and I'm not going to leave you lying here..."
The Third option is correct.
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