Sentence Correction (SC) | Re: One of the earliest known birds with a beak and contour feathers, Conf

A. with large clawlike “thumbs” on its wings, which probably helpedthem to
B. with large clawlike “thumbs” ontheir wings, which probably helped it to
C. had large clawlike “thumbs” on its wings, which probably helpedthem
D.had large clawlike “thumbs” on its wings, probably to help it
E. had large clawlike “thumbs” on their ings, probably to help it
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