英语翻译

题目

英语翻译
Although the prevailing supposition has been that it is too hot for microorganisms to survive deep below the Earth's surface,some scientists argue that there are living communities of microorganisms there that have been cut off from surface life for millions of years.These scientists base their argument on the discovery of living microorganisms in samples of material that were taken from holes drilled as deep as 1.74 miles.The scientists' argument depends on which of the fol- lowing assumptions?
　　(A)The microorganisms brought up were of a species that is related to those previously known to science.
　　(B)No holes have been drilled into the Earth's surface to a distance deeper than 1.74 miles
　　(C)The microorganisms did not come from surface soil that came into contact with the drilling equipment.
　　(D) The stratum from which the samples came has been below the surface of the Earth ever sincethe Earth came into existence.
　　(E) The temperature at the bottom of the holes drilled was not significantly hotter than that of the hottest spots on the Earth's surface.

答案

文章大致内容是 以前科学家认为大地深处温度太高了,微生物无法生存.但是有些科学家认为有微生物群生活在哪里.证据就是他们在1.74英里深的土壤样本里发现了微生物.
问题是科学家的假设是什么.
我个人的观点是一个假设是他们发现的微生物是原本存在于土壤样本里的,而不是挖掘器械带下去的.那么就是答案C了.这个答案比较直接.