GMAT Sentence Correction (SC) | Significantly more advanced and sophisticated than the mechanical pros

Significantly more advanced and sophisticated than the mechanical prosthetic, the C-Leg prosthetic works as a real limb does, enabling the amputees to walk at near walking speed, allowing for typical variations in the speed, and making it possible for the amputees to walk down the stairs with a step-over-step approach rather than the one-step-at-a-time approach used with mechanical knees.

A. as a real limb does, enabling the amputees to walk at near walking speed, allowing for typical variations
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