求教PREP中的一道题！

Traces

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。想不通B哪里不对了，忘解答。谢谢了！！！

这道题的D答案感觉好像很勉强。其他的更不着边了。

原文的意思是在亚洲和欧洲的很多地方都发现了人工栽培的某种小麦的痕迹，但是只有在亚洲的某一个地区才发现了此种小麦的野生品种，而同时也在此地区发现了最早期的人工培植的此种小麦，哪么可以推断：此地区是最早进行该野生小麦人工栽培活动的地区。

D说该地区有农业活动以来的气候变化很小。我的理解是不是因为气候变化小，因此农民利用野生小麦来改良进行人工栽培的可能性就比较大，而不会是从别的地区引进的品种以适应气候的变化？

因为“The only place where the wild form of emmer wheat has been found growing is a relatively narrow strip of southwest Asia.”

B说这种野生的品种可以很好地被家养，所以当地的人就会种植啊。为什么不是加强呢？

B的意思是这个野生品种被证实很容易家养以至于达到和传统优势品种一样的产量。

我感觉原文的意思就是要选择一个“一定要在这个地区发生的事情”。所以D中的气候是针对该地区的。B中的该品种的特点并不能证明就一定在该地区被的发展。

lz看结论： it is clear that emmer wheat was first domesticated somewhere in that strip;

体会黄色加亮部分；再比较B/D,是不是D和结论更相关呢？B其实是个无关选项

非常感谢你哦。