Re-ordered, the structure of the argument is as follows:
Premise: Nearly all students who commute to campus live close enough
to the university to easily walk there.
Sub-Conclusion: Hence, the revenue generated by a pay-to-park system
would actually be quite small.
Conclusion: The campus parking authority’s claim that the university is
losing substantial revenue each semester by allowing
commuting students to park on campus for free is clearly false.
The author notes that the campus parking authority claims to be losing
substantial revenue due to free on-campus parking, but the author disagrees
with that conclusion because nearly all the currently commuting students
live close enough to campus to walk. Thus, to support the conclusion that the
revenue gained by a pay-to-park system would be small, the blank must be
filled by an answer that connects the current commuters to the ability to
walk to campus. This Supporter connection is perfectly stated in (B), the
correct answer.
Answer choice (A): This answer does not address the fact that revenue
would not increase, because no information is given about full-time students
as they relate to the commuters. If every student is a full-time student, that
might hurt the argument, but if there are hardly any full-time students, that
would help the argument. In any event, the statement is not an assumption of
the argument.
Answer choice (B): This is the correct answer, a Supporter.
Answer choice (C): The argument is about additional revenues, not about
costs. Because this answer is about costs, it is not an assumption of the
argument.
Answer choice (D): This answer is an immediate Loser. No discussion or
assumption is made about the university’s total revenue or overall revenue
sources.
Answer choice (E): While this answer possibly supports the campus
authority’s argument, it neither assists nor damages the author’s argument