The answer is (D).
Solution:
The passage outlines a position taken by some museum directors - according to which, since paint is the least sensitive and can withstand changes, changes in temperature can be made, and then calls that position into question - since Gesso may actually be more sensitive. Thus, the first BF (paint is the most sensitive) is a judgement that has been offered in support of the position that the argument calls into question, and the second (changes in humidity can be
...
Solution:
The passage outlines a position taken by some museum directors - according to which, since paint is the least sensitive and can withstand changes, changes in temperature can be made, and then calls that position into question - since Gesso may actually be more sensitive. Thus, the first BF (paint is the most sensitive) is a judgement that has been offered in support of the position that the argument calls into question, and the second (changes in humidity can be
...
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