SDW2
GMATNinja
...You could also argue that the pronoun “their” is potentially ambiguous. It could refer to the rhinos or the tourists or the poachers, and only the rhinos would make sense, since tourists and poachers rarely trim their own horns. And again, pronoun ambiguity isn’t an absolute rule (more on that in
this video), but we’ll have better options in a moment....
Hello
GMATNinjaThanks for the detailed explanation. However, I have a query regarding pronoun ambiguity. You mentioned in option A that "their" could refer to rhinos or tourists or poachers and eventually eliminated tourists and poachers saying that only rhinos make sense since rhinos have horns.
So, I wanted to know when do we say that there's pronoun ambiguity? Is it when there are more than 1 contenders (nouns) for a pronoun and all or some of them make sense
OR
Can we say that there's pronoun ambiguity even if there are multiple nouns but only 1 of them is contender because only this 1 contender makes sense (like in this option A)?
Unfortunately it's impossible to draw a clear line between acceptable pronoun ambiguity and unacceptable pronoun ambiguity. And I certainly wasn't trying to say that it's okay to have multiple potential referents IF AND ONLY IF exactly one of them makes sense. As long as you have multiple potential referents, you can technically argue that there is SOME ambiguity.
Now if all but one of those referents is completely illogical, that certainly makes the ambiguity LESS of an issue. But again, it's impossible to draw a clear line in the sand.
The takeaway is that pronoun ambiguity is not a bulletproof reason for eliminating an answer choice. But if you are
comparing two choices (i.e. choice (A) and choice (C) in this question) and only one of those two has an ambiguous pronoun, then you might have a vote in favor of the choice that avoids that ambiguity.
More broadly, you always want to consider
clarity of meaning. If pronoun ambiguity makes the meaning unclear in one choice but not in another, you likely have a vote against the first one.
Sorry for the somewhat ambiguous (haha?) response... but unfortunately there are no black and white rules for this sort of thing. I know: it's maddening, but that's the GMAT for you.

And if you want a maddening full video on GMAT pronouns,
here it is.
I hope that helps a bit!