GMAT Sentence Correction (SC) | China’s vast network of dams has long stood as the country’s primary s

HelloGMATNinja ,

I also marked A as the answer, considering 'its' is referring back to "China's" but looks like there is a lot of confusion here. Your comments prove that my point is valid.

Can you please suggest what should I mark for this question?

I am not clear on the last lines you mentioned for this question in your post.

"To be fair, there's some grey area in this case, since "China's" and "its" are both possessive. But since both "China's"
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