21.
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.
正確答案是 D
可是我實在看不懂
有請好心人士幫忙解答
謝謝!!
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