CR Weaken Carpenter

[sachindia]

Guidebook writer: I have visited hotels throughout the country and have noticed that in those built before 1930
the quality of the original carpentry work is generally superior to that in hotels built afterward. Clearly carpenters
working on hotels before 1930 typically worked with more skill, care, and effort than carpenters who have
worked on hotels built subsequently.
Which of the following, if true, most seriously weakens the guidebook writer's argument?
(A) The quality of original carpentry in hotels is generally far superior to the quality of original carpentry in
other structures, such as houses and stores.
(B) Hotels built since 1930 can generally accommodate more guests than those built before 1930.
(C) The materials available to carpenters working before 1930 were not signifi cantly different in quality from
the materials available to carpenters working after 1930.
(D) The better the quality of original carpentry in a building, the less likely that building is to fall into disuse and
be demolished.
(E) The average length of apprenticeship for carpenters has declined signifi cantly since 1930.

[Bill@VeritasPrep]

Conclusion: before 1930, carpenters worked with more skill, effort, and care. (based on the quality of hotel carpentry before and after 1930).

A--we are not concerned with other structures.

B--hotel capacity is irrelevant.

C--this removes another possible variable and thus strengthens the conclusion

D--correct. If only the best quality hotels are still standing, then we may have a false impression of the quality of work.

E--we have no way of knowing how this would affect skill, care, and effort.

[maxmarrie]

Thanks bill for this authentic answer.