GMAT Sentence Correction

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Source: PREP

Level: 3

One of the earliest known birds with a beak and contour feathers, Confuciusornis sanctus, with large clawlike "thumbs" on its wings, which probably helped them to climb up to a launching position for flight.

  • A with large clawlike "thumbs" on its wings, which probably helped them to
  • B with large clawlike "thumbs" on their wings, which probably helped it to
  • C had large clawlike "thumbs" on its wings, which probably helped them
  • D had large clawlike "thumbs" on its wings, probably to help it
  • E had large clawlike "thumbs" on their wings, probably to help it

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