Sally's argument -
Alcohol problem --> cannot study
therefore,
if nothing is done to address the alcohol problem at this university --> transfer to a university without fraternities
In making this conclusion, she seems to be assuming that -
university without fraternities --> no alcohol problem
Let us look at the answer options --
Option A - Incorrect.
there is no such assumption made about the number of universities that have and that do not have fraternities.
Option B - Incorrect.
She specifically say "
unless" something is done about the problem at her university, she will transfer. Hence, we are not sure whether something will be done to address the alcohol problem at her university.
Option C - Incorrect.
We have information about only one university. We cannot infer about others.
Option D - Incorrect.
the argument does not talk about legal issues.
Option E - Correct.
look at the assumption that we wrote -
university without fraternities --> no alcohol problem
If there were no such universities, her conclusion that she'll have to transfer to a university with no fraternities will collapse.