Traces of cultivated emmer wheat have been found amongthe earliest agricultural remains of many archaeological sites in Europe andAsia. The only place where the wild formof emmer wheat has been found growing is a relatively narrow strip of southwestAsia. Since the oldest remains ofcultivated emmer wheat yet found are from village sites in the same narrowstrip, it is clear that emmer wheat was first domesticated somewhere in thatstrip.

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

　　(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 caneasily be domesticated so as to yield nearly as well as traditionally cstrains.

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

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

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

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