mykrasovski
This is a strange question. It resembles the Inference question because it asks to use the information in the prompt to undermine one of the five options... So, is this a Weaken or Inference question?
I might be wrong, but I have never seen a similar GMAT problem.
So first thing to note here:
this appears to be an LSAT question, so I wouldn't take this as a particularly representative example of GMAT CR questions. That said, the GMAT does sometimes play around with the form, so being prepared for something like this isn't a bad idea.
This is a weird question because, like an inference question, we are drawing a conclusion — the stimulus is entirely made of premises, and the answer choices are all conclusions. However, unlike an inference question (where the correct conclusion must be 100% true given the premises), the correct conclusion is meant to be false: the premises should not lead to the conclusion. We can almost think of an inference question as a reverse strengthen, whereas this question is a reverse weaken.
So it doesn't fit nicely into one of the classic question type boxes that we normally see. This, again, is likely because it isn't a GMAT problem, but if you did see something like this on test day, I would be prepared to bring elements of both Inference and Weaken to the table.