Official Explanation Magoosh:
(A) There are a couple of issues, both very subtle, going on here. First off, “the maintaining” is not doing the overlooking. Yes, this is very nitpicky, and, in of itself, would never make or break an answer. Coupled with the second issue, however, we have an answer choice that falls short of being the best answer. The second issue is the comma between “cohesion” and “overlooks”. We do not want a comma to separate the noun phrase from its verb. To make
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