Ah -- now that I'm looking at it more closely, I think the original question at the beginning of the thread was botched somehow. It looks like somebody took the official GMAT version (posted above by sandeepb17), and tried to tweak it a little bit, but I really don't think that the correct answer is as clear as it should be. I'm skeptical that it's from an official source at all, to be honest.
And I looked through old editions of the OGs, and the version that sandeepb17 posted is in the 2016,
...
And I looked through old editions of the OGs, and the version that sandeepb17 posted is in the 2016,
...
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