请教一道prep小麦题，非常感谢

fiontse

Traces of cultivated emmer wheat have been found among the earliest agricultural remains of many archaeological sites in Europe and Asia.  The only place where the wild form of emmer wheat has been found growing is a relatively narrow strip of southwest Asia.  Since the oldest remains of cultivated emmer wheat yet found are from village sites in the same narrow strip, it is clear that emmer wheat was first domesticated somewhere in that strip.

Which of the following, if true, most strengthens the argument?

 

(A) The present-day distribution of another wild wheat, einkorn, which was also domesticated early in the development of agriculture, covers a much larger area of southwest Asia.

(B) Modern experiments show that wild emmer wheat can easily be domesticated so as to yield nearly as well as traditionally domestic strains.

(C) At the time when emmer wheat was first cultivated, it was the most nutritious of all the varieties of grain that were then cultivated.

(D) In the region containing the strip where wild emmer wheat has been found, climatic conditions have changed very little since before the development of agriculture.

(E) It is very difficult, without genetic testing, to differentiate the wild form of emmer wheat from a closely related wild wheat that also grows in southwest Asia.

答案是D。不明白什么意思，大家可以帮忙解释一下吗？

exoplanet

加强题

• 结论：it is clear that emmer wheat was first domesticated somewhere in that strip.
  
• 原因：the oldest remains of cultivated emmer wheat yet found are from village sites in the same narrow strip.
  
• 正确答案作用：1. 正确答案一定要提高结论成立的可能性；2. 正确答案一定要能与原因结合，也就是说要么与原因互补，要么与原因有公共的元素。
  
• 思考：需要加强emmer wheat在这个strip被培育出来。原因是在这个narrow strip里有emmer wheat的残留物被发现了。答案应该是能与narrow trip能够结合起来。
  

选项分析

• A：无关比较，把einkon拿来比是没有意义的。与结论无关，也与原因无法结合;
  
• B：把emmer wheat的产量与traditionally domestic strains的产量比较是无关比较。而且跟emmer wheat是否是在strip被培育出来（结论）没有关系，也与原因无法结合。
  
• C：说emmer wheat是最有营养的，既不能与原因相结合，也与emmer wheat在哪培育出来（结论）没有关系。也属于无关比较；
  
• E：分清楚这种emmer wheat和另外一种wild emmer wheat较困难。这个和narrow strip培育出emmer wheat没有关系，也与原因无法结合
  
• D：提到了说到了the narrow strip(In the region containing the strip where wild emmer wheat has been found)，这是个与原因的结合点。这个strip的气候条件一直没有发生改变，那说明，emmer wheat确实很容易在这个narrow strip培育出来。加强了结论。正确答案。
  

知识点：无关比较，原因结合

qitaza

解释的超级棒！！！