请教，prep1-21

21.   (28551-!-item-!-188;#058&003690)

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.

我选B，答案是D，疑惑ing

欧洲 亚洲发现了很多人耕种的A物种遗迹。但是野生的A只在亚洲某地被找到，且最早的人耕种A的遗迹也在此地被发现。

所以：A最早是在这里被人耕种的。

中间差在，是不是野生的A一直在这里生存，一直到人们发现并开始耕种它。如果野生的A中途绝迹了，那就不能说明这里的人们最先在发现野生A。

所以要保证这里的气候没有大的变化，保证野生的A一直生存到before the development of agriculture.

因为野生的A谷物只有在亚洲的strip被发现到…而最古老的A栽种谷物遗址也是在strip被发现…如果要在两个中家家上关连性…证明A谷物是在strip原生的…则必须加上一个条件..就是野生的A股务要能持续存活到农业发展的出现…若是这期间strip的野生股务因为天气的转变而灭种…则就算最古老的古物遗址出现在strip..也可能是由其它的地方传来的而非原生于此

顶一下，还是没怎么看懂呢？那如果间断了的话？欧洲人就是最早栽种的的，他们是从strip这个地方把野生谷物带去，保存到有农业的时候开始栽种的吗？还是The only place where the wild form of emmer wheat has been found growing is a relatively narrow strip of southwest Asia.这句话没有排除欧洲那里也有野生谷物（只是欧洲那里现在没有野生谷物了）

我的看法：

B选项的问题 Modern experiments的结果只能证明现在能发生， 并不一定能够证明 history发生的事情

其实自己最初也选的是B，后来看答案 慢慢推敲，觉得这可能是一个理由，请NN指正

我觉得就是B，上考场肯定也选B

看了这道题之后，我一直在怀疑prep的答案是不是都对。。。