Concl - The fact gives traditional attribution of a disputed painting special weight, since that attribution carries the presumption of historical continuity.
Premise - This fact >> is that it is difficult to prove painting unless there is authentic signature of the artist
Now, we need to support the position that traditional attribution SHOULD NOT have special weight ( or in reversal of terms, we need to weaken this argument)
The additional reasoning should help me to explain why there is no need to give such special weightage towards traditional attribution
B - Yes question of correct attribution doesnt arise, but it doesn't link to our argument here. What we are trying to find is a reasoning that can help us to say that there shldnt be special weightage for traditional attribution, and not why the attribution via signature etc isn't needed
C - This in fact may require traditional attribution, since if you can't discern the work... at least we know who is the original artist ( the recognized master )
D - Doesn't rly tell me what i need for the reasoning, but more on how attribution shapes perception.
E - This also explains why traditional attribution is needed, since we need to attribute work to the masters
A - This explains why weightage shldn't be given, since I can just attribute any painting to a master of influence, to generate profits. When it fact, the obscure artists could be the original owner.
Thus, A is the answer.
This question is rather atypical of a gmat argument though. Usually in a traditional weaken, you'll just need to directly weaken the argument and usually the gap inreasoning is rather related to the context. Thus, you are able to follow a structured way to get to your answer
The answer is more of pure logical thinking and intuition here, which is harder to hack.. In fact, this question surprisingly felt way easier than a gmat argument if i were to just purely use intuition and common sense.