A CR question whose answer is tearing me apart

Please I'm not asking for the answer.

Does this mean that a dubious premise takes precedent over a logic gap(btween premise and assumption) in evaluating CR questions?
read below

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 significantly 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 significantly since 1930.

I'm not asking for the answer. The OA is D cos it makes the premise questionable/dubious, even though there is no proof just the possibilty/suggestion. (which is enough to weaken).

Now option C is a weakener too u would observe. If the materials(before 1930) were much better in quality then it might be the material used for the work that made the work superior and NOT any greater skill and effort. This is a case of alternative cause(1) and or logic gap violation (2).

My question is:




Does a questionable premise weigh more than a logic gap(between premise & conclusion)? i ask because there other weaken questions whose correct answers stem from simple logic gap.
Clearly the two met in the above question.

I'll humbly appreciate your generous response with kudos.