Political Candidate: The average apartment in nearby Saratoga Springs

Hi can please someone tell me why option B cannot be the answer. This options also seems right.
How to choose between option C and B?

TF is one of the most desirable places to live in the area.

But what about SS? Is SS too one of the most desirable places? No idea

Is being a desirable place = justification for high rent? Probably. I mean, if New City is a desirable place, the rent out there is going to be higher as compared to a not-so-desirable place.

With (B) we aren't sure how the political candidate is not justified in his claim.

Now, if we look at (C) we have a clear winner. Pay attention to what the candidate is saying "It is unacceptable that the average renter in Trenchard Falls pays more for housing". But if we consider (C) we see that the average renter will be paying way less than $1600. Since there a roommates (notice the plurality) we can reasonably conclude that the $1600 will be split amongst 2 or more people. Thus making TF renters, on average, pay lesser rant than renters of SS

VERITAS PREP OFFICIAL SOLUTION:

This problem exemplifies a common Strengthen/Weaken structure when prompts involve data: the data given (the average rental cost of an apartment) is very related to but just slightly different from the data in the conclusion (that the average renter pays more). Note that these are two different metrics: what the average apartment costs vs. what the average renter pays.

Correct choice (C) shows why this is a gap: what if almost everyone in Trenchard Falls has a roommate (or several), but very few people in Saratoga Springs does? That would mean that the average $1600 rent in Trenchard Falls gets split between multiple people, whereas the average $1400 rent in Saratoga Springs is paid by only one person. At that point renters in Trenchard Falls would pay much less than their neighbors the next town over. Choice (C) attacks that gap between "average apartment" and "average renter" and is therefore correct.

Among the other choices:

If anything, (A) strengthens the conclusion by showing that Saratoga Springs has taken an active (limiting rent increases) step toward keeping rent down.

(B) does have some merit as it shows a potential reason why Trenchard Falls rent may be expensive, but note that you don't have a comparison to Saratoga Springs which could also rank high on those lists. Since the conclusion is a direct comparison between the two cities, merely knowing that there is demand for housing in one doesn't help you better understand that comparison.

(D) suggests a reason that someday rent might come down in Trenchard Falls (more supply), but note that the politician's conclusion is about the current state of affairs, for one, and that just adding more supply doesn't mean it will be more affordable supply.

And (E) similarly talks about the future, suggesting that rent in Saratoga Springs may soon catch up, but again the conclusion is about the present.