Which of the following most logically completes the argument?
A certain cultivated herb is one of a group of closely related plants that thrive in soil with high concentrations of metals that are toxic to most other plants. Agronomists studying the herb have discovered that it produces large amounts of histidine, an amino acid that, in test-tube solutions, renders these metals chemically inert. Possibly, therefore, the herb’s high histidine production is what allows it to grow in metal-rich soils, a hypothesis that would gain support if ______.
A: histidine is found in all parts of the plant – roots, stem, leaves, and flowers
B: the herb’s high level of histidine production is found to be associated with an unusually low level of production of other amino acids
C: others of the closely related group of plants are also found to produce histidine in large quantities
D: cultivation of the herb in soil with high concentrations of the metals will, over an extended period, make the soil suitable for plants to which the metals are toxic
E: the concentration of histidine in the growing herb declines as the plant approaches maturity
C
希望NN能帮帮忙，这个和others of the closely related group of palnts 有什么关系呀？题干中的逻辑链条我实在理不清楚。还有a hypothesis that would gain support if ，这句话到底是什么意思啊，这个是对什么的hypothesis，从哪里gain support，有什么表现呀？
先谢谢了
另外，关于GWD的题有没有向OG 一样的解释的版本呢？我感觉做GWD的逻辑错得太多了，一个一个拿到CD上来不太现实，除了问CD还有其他的方法能问到答案的解释吗？
多谢
现在的复习十分痛苦
这个题选E
是这样的原文说有一种植物他能在特定的土壤里生长，科学家发现是因为他分泌一种H。问加强
我现在要加强的是Ｈ使他生长。记住哦
A选项说这种H在这个植物的所有的部分被发现包括根部。。。（无关）
B说这种草的高的H的低的酸联系在一起。（无关）
C说其他相近的植物，也分泌H。（这个你要加强你要说其他相近的植物也能在这种土里生长。所以也可以排除）
D说把这种植物从土里拿掉以后，这个土就可以适合其他植物生长了。
E说随着这种植物成熟他的H浓度降低。
这个题目最主要的矛盾在Ｄ和E中。 其实还是很明显的E比D好。 你想不要往里加任何推论D并不能说明 因为分泌H而使得他生长。
而Ｅ很清楚，生长的时候分泌Ｈ 不生长H浓度降低。是正确选项了。
GWD的题目楼主还是在做完PREP和OG后再做比较好。因为首先要花大量精力，其次题目也偏难。
另外答案可以在论坛里搜到。去看有篇文章叫如何快速定位题目
C 正确。if the plant have H, it will survive.
E irrelevant. maturity is too far away.
grow = survive
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