Are you asking why the man is worried about getting frostbite? because if so, then he was worried because it would delay him.
Something that is necessary is 'needed'.
Answer:
i think B. correct me if i am wrong
Explanation:
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I became, in short, the gangling farmer-boy my aunt had known, C. Scourged with chilblains and bashfulness, my hands cracked and raw from corn husking.
Scourge is something that causes suffering.</span>