Here we have a necessary assumption question.
I think this question is the perfect example of how the negation test can provide the correct answer choice, as the credited response is very easy to negate.
Background: Chairperson of Acme moving company from Milltown to Oceanview.
Premise: Most people cannot afford housing within 30 mins of Oceanview.
Conclusion: Once in Oceanview, most employees will have to commute more than 30 mins.
So our goal is to find something that the arguments depends on, as you can see there is a logical gap between our premise and conclusion. We want to find answer that connects P-->C.
I will admit that when I first looked at this question I thought that the answer choice would be something like "most employees currently commute less than 30mins". I was focusing on the wrong part of the argument.
Anyways, here is a rundown of the answers:
(A) Irrelevant, we are moving to Oceanview, where employees live in Milltown has no bearing on the argument. This does not help us.
(B) This is irrelevant, out of scope.
(C) Out of scope.
(D) Currently, --> We don't care how far the employees employees are commuting in their present situation.
(E) The move will not be accompanied by a pay raise. I will admit, on my first rundown I thought that this was out of scope. However, when I applied the negation test --> The move WILL be accompanied by a pay raise. If that is the case then the argument falls apart as it destroy the Premise that they cannot afford to live within a 30 minute commute. If there wages are increased then perhaps they can!
Let me know if I'm missing anything.