求教:问PREP逻辑的第一题

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.

答案是Ｄ，可是我实在想不出来Ｄ是什么意思，我觉得Ｂ是答案．关于这个＂形成环境＂决定＂物质性状＂的题目感觉读不懂，请高手指教！谢谢　

哈哈，我这个菜鸟试着说说看哈。。。

题目里说，Since laboratory synthesis of fullerenes requires distinctive conditions of temperature and pressure,

但是后来结论说的就是this discovery （found in nature  可以……

而D给出了自然发现的和实验室里的东西的区别，说明discovery不能……