GWD-8-Q22*:

When storing Renaissance oil paintings, museums conform to standards that call for careful control of the surrounding temperature and humidity, with variations confined within narrow margins. Maintaining this environment is very costly, and recent research shows that even old oil paint is unaffected by wide fluctuations in temperature and humidity. Therefore, museums could relax their standards and save money without endangering their Renaissance oil paintings.

Which of the following is an assumption on which the argument depends?

A. Renaissance paintings were created in conditions involving far greater fluctuations in temperature and humidity than those permitted by current standards.
                    

B. Under the current standards that museums use when storing Renaissance oil paintings, those paintings do not deteriorate at all.
                    

C. Museum collections typically do not contain items that are more likely to be vulnerable to fluctuations in temperature and humidity than Renaissance oil paintings.

D. None of the materials in Renaissance oil paintings other than the paint are vulnerable enough to relatively wide fluctuations in temperature and humidity to cause damage to the paintings.

E. Most Renaissance oil paintings are stored in museums located in regions near the regions where the paintings were created.[D]

疑问：

我看了此题的讨论贴，大家都在讨论D与E，anyway，我选的是C.我的理解是：题目中说even old oil paint is unaffected by wide fluctuations in temperature and humidity，就是用old paint做了衡量的标准，那么把这个标准作为假设，选C，即肯定没有别的画比这个更能受影响，所以论证是对的，不可以吗？

而且用取非也成立阿，取非后：收藏品中有比old paint更容易受损的paint存在，所以放松标准是不行的。与原命题相反。

请各位大侠指点。

Argument: "Therefore, museums could relax their standards and save money without endangering their Renaissance oil paintings."

C is irrelevant because it talks about something other than Renaissance oil paintings.