Sentence Correction (SC) | Found only in the Western Hemisphere

My analysis.

(A) Found only in the Western Hemisphere and surviving through extremes of climate, hummingbirds’ rangeextends
This sentence says the humming birds' range is found in the western hemisphere - Incorrect

(B) Found only in the Western Hemisphere, hummingbirds survive through extremes of climate, their range extending
After the first noun modifier we stop and ask, who or what is found in the western hemisphere? Hummingbird. this answer is correct.
(C) Hummingbirds, found only in
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