Editorial: The roof of Northtown's municipal equipment-storage building collapsed under the weight of last week's heavy snowfall. The building was constructed recently and met local building-safety codes in every particular, except that the nails used for attaching roof supports to the building's columns were of a smaller size than the codes specify for this purpose. Clearly, this collapse exemplifies how even a single, apparently insignificant departure from safety standards can have severe consequences.
The conclusion of the argument is the following:
this collapse exemplifies how even a single, apparently insignificant departure from safety standards can have severe consequences
The support for the conclusion in this case is everything that precedes the conclusion:
The roof of Northtown's municipal equipment-storage building collapsed under the weight of last week's heavy snowfall. The building was constructed recently and met local building-safety codes in every particular, except that the nails used for attaching roof supports to the building's columns were of a smaller size than the codes specify for this purpose.
We see that the reasoning of the argument is basically that, since a certain building's roof collapsed when nails used in constructing the roof were of a smaller size than codes specify, it is clear that not following codes exactly can have severe consequences.
The underlying assumption of that reasoning is that the use of nails that didn't meet the codes was the cause of the collapse.
Which of the following, if true, most seriously weakens the editorial's argument?
This is a Weaken question, and the correct answer will show that, even though it's true that the roof collapsed when nails that didn't meet codes were used, the conclusion that a single, apparently insignificant departure from safety standards can have severe consequences may not be correct.
(A) The only other buildings to suffer roof collapses from the weight of the snowfall were older buildings constructed according to less exacting standards than those in the codes.
This choice supports, rather than weakens the case for, the conclusion.
After all, this choice shows that, where the presumed cause, construction that does not meet codes, was not present, the effect, roof collapses, was not present either.
So, this choice strengthens the connection between construction that does not meet codes and roof collapses.
Eliminate.
(B) The amount of snow that accumulated on the roof of the equipment-storage building was greater than the predicted maximum that was used in drawing up the safety codes.
This choice is interesting.
After all, if this choice is true, then it seems logical that the roof would have collapsed even if the nails used had met the codes. After all, if the amount of snow on the roof was greater than the predicted maximum used in drawing up the codes, then even if the construction of the roof had met the codes, the roof may have collapsed.
So, this choice weakens the argument by showing that something other than the use of nails that didn't meet the codes could have been the cause of the collapse and thus attacking the underlying assumption that the failure to meet the codes was the cause of the collapse.
Keep.
(C) Because the equipment-storage building was not intended for human occupation, some safety-code provisions that would have applied to an office building did not apply to it.
This choice is a little tricky to eliminate.
After all, if it's true that some code provisions did not apply to the construction of the storage building, then it seems possible that the roof collapsed because it was built in accordance with relatively weak codes.
At the same time, a roof is a roof regardless of whether it's on an office building or a storage building. So, common knowledge and common sense tell us that the codes for the basic construction of a roof would be the just as strong for a storage buidling as for an office building.
In general, this choice indicates that there are more codes for office buildings, but that information does not mean that the codes for storage buildings are not sufficient for ensuring sturdy construction of storage buildings.
So, this choice is probably incorrect.
Keep for now but expect not to be the correct answer.
(D) The municipality of Northtown itself has the responsibility for ensuring that buildings constructed within its boundaries meet the provisions of the building-safety codes.
This choice provides some background information on how the process of the codes being met generally works.
This information doesn't indicate anything about whether not meeting codes "can have severe consequences."
After all, not meeting codes may or may not have severe consequences regardless of who is responsible for ensuring that they are met.
Eliminate.
(E) Because the equipment-storage building was used for storing snow-removal equipment, the building was almost completely empty when the roof collapsed.
This choice indicates that it's likely that there was little damage to contents of the bulding when the roof collapsed. So, in one way, there were not consequences of the collapse.
At the same time, this choice doesn't weaken the argument since, even if there was little damage to contents of the building, the collapse of the roof itself could be considered "severe consequences.
Eliminate.
Final analysis: Since (B) clearly weakens the argument whereas (C) does not clearly indicate that there may have been another reason for the collapse, we can safely choose (B).
Correct answer: B