真的是慌，模考的状态还是不尽如人意。最后四天了，挺也要挺过去。努力争取最好的结果吧。
这个题还是想不通。请教各位。先谢了。
Ahthough fullerenes---spherical molecules made entirely of carbon---were first found in the laboratory, they have since been found in nature, formed in fissureds 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 tcok 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.
答案选D啊，感觉好奇怪，不懂。
不好意思，刚找到以前的讨论贴了。解释得很清楚。
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