I'll try , bk1111!
To understand these answers better, try substituting them back into the passage in place of the language we are being asked about, that those implications are counterintuitive. Here's what that would look like with answer A, the correct answer:
"Some commentators have rejected this position because [it conflicts with some commonly held beliefs]"
Sounds about right. What about plugging in answer C instead?
"Some commentators have rejected this position because [common sense indicates that philosophical anarchism does not have the implications that follow]"
That's the opposite of what the author is getting at. He is trying to say that those commentators think philosophical anarchism HAS two implications (the ones he discusses just after those lines), and that those implications are counterintuitive, meaning they conflict with what our intuition tells us should be true. Answer C says the commentators believe philosophical anarchism could not reasonably be expected to have those implications.
It's a pretty messy answer, and I hope my scrubbing it made it look a little cleaner for you!
Adam M. Tyson
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