PREP-1-21

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.

答案很明显是(D), 因为其他无关选项很清楚，可是不太理解(D)是如何支持的，请帮忙说明

我试试,

结论是:因为the oldest remains of cultivated emmer wheat yet found are from village sites in the same narrow strip推出first domesticated somewhere in that strip

oldest=first?

选项d排除其他其他因素支持发现的最老的谷物就是最早种的小麦.oldest=first

谢谢您的回覆....可是我还是不太理解这个意思

哪位好心的人可以给我解释一下(D)选的支持的思路啊!!!

脑子全卡住了

D---when the agriculture begins, the cultivated wheat begins.

if we can ensure the environmental condition for both wild and cultivated wheat is not much different, that provides a good legitimate background to conclude that the strip can be the place for the earliest cultivation.