GMAT Critical Reasoning (CR) | Re: Student Advisor: One of our exchange students faced multiple

Great explanation fluke!

This is a classic type of assumption. Anytime you are presented with an observation about two events that CORRELATE, and the conclusion makes a CAUSAL claim, it's a very good idea to check that there were not alternate models of causation that could have explained the observed phenomenon.

Remember that you're looking for a *necessary* assumption for these arguments--without that assumption being true, the argument falls apart. As gmatpassion said above, if you negate