prep1--1

Although fullerenes--spherical molecules made entirely of carbon--were first found in the laboratory, they have since been found in nature, formed in fissures of the rare mineral shungite.  Since laboratory synthesis of fullerenes requires distinctive conditions of temperature and pressure, this discovery should give geologists a test case for evaluating hypotheses about the state of the Earth's crust at the time these naturally occurring fullerenes were formed.

Which of the following, if true, most seriously undermines the argument?

(A) Confirming that the shungite genuinely contained fullerenes took careful experimentation.

(B) Some fullerenes have also been found on the remains of a small meteorite that collided with a spacecraft.

(C) The mineral shungite itself contains large amounts of carbon, from which the fullerenes apparently formed.

(D) The naturally occurring fullerenes are arranged in a previously unknown crystalline structure.

(E) Shungite itself is formed only under distinctive conditions.

为什么选D,不是很明白,谢谢大家了

D选项的翻译 是说这种天然形成的F 存在于一种前所未有的晶体结构中。

那我要是说  水 存在于前所未有的一个星球上的话，岂不是也不能削弱以上的结论？

我赞成D)是最好的选项。科学家本来想通过这样的逻辑：特定的温度和压力合成人工的fullerenes，人工的fullerenes和自然产生的fullerenes完全一致，因此自然产生的fullerenes也需要特定的温度和压力。那要Weaken这个过程的最佳办法就是证明人工合成的和自然产生的并不是一样的。D)提出了这一点。

ruirui_hsu你这个问题我不知道该怎么理解能不能解释一下？“那我要是说  水 存在于前所未有的一个星球上的话，岂不是也不能削弱以上的结论？”