Conclusion: A is more informed
Evidence: More subscriptions in A
What are the holes in logic here? The author claims “more subscriptions” —> “better informed” but what if all those subscriptions in A were purchased by 1 person? So there’s an assumption that there’s a wide dispersal of the extra subscriptions among the Town A citizens. There’s also an assumption that this sports magazine thoroughly covered “international” sporting competitions.
Rephrase: What does NOT weaken the Conclusion?
Prediction: Anything that STRENGTHENS the Conclusion, or at least the choice that is the most compatible with the presented Evidence and stated Conclusion. The correct answer will ideally continue to support the idea A is more informed.
Also, let’s remember the wording of this question tells us that 4 options will weaken the conclusion. So let’s look for those to eliminate first. Let’s find the “three worst” – i.e. the three that blatantly weaken the conclusion.
(A) A has more people
This could weaken – if A has more people then they could proportionally be as informed as the people in B, but still have more subscriptions
If we wanted to make the argument that (A) is correct, it would have to STRENGTHEN the idea that A is more informed. But more people does not necessarily mean better informed.
(B) Some B people get their magazines from A
This could weaken – if B are getting their magazines from A then B could be just as informed, but still have more A subscriptions
(C) B watches sports cable than A
This could weaken – if B is getting news from elsewhere, then it’s possible A is not more informed, even though it has more subscriptions
(D) there’s a popular mag in A
This information is more ambiguous than A, B, and C, but could weaken if we consider that it doesn’t touch upon B. B could have a similar magazine.
(E) subscription is cheaper in A
This is finally info that is strongly compatible with the Conclusion! If the average price is lower (and yes, you’re right, the word “average” does allow us to draw a bigger inference here) and more subscriptions are sold, then it’s reasonable to continue to assume A is more informed.
The “three worst” here are (A), (B), and (C) since those could strongly weaken the conclusion. Let’s examine the “final two.” One of these will STRENGTHEN and one will not. We just have to figure which information is more compatible with the conclusion/evidence!
If we wanted to eliminate (E), we’d need to prove that is strongly WEAKENS the conclusion. But cheaper prices in A does not weaken the idea that A-people are more informed. It’s gotta be correct! We cannot ADD information – this choice doesn’t SAY “and people from B buy magazines there.” We cannot add facts from Choice (B) into (E).
The correct answer is (E).