The geneticists extracted tissue from several different locations in each mummy because___
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The geneticists extracted tissue from several different locations in each mummy because______.
A．there was no chance the specimen would be contaminated
B．different research purposes would be fulfilled
C．the tissues would be studied by different scientific groups
D．some of the tissues would be contamination during the process of research
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正确答案：A
解析：遗传学家们从每具木乃伊的不同位置提取组织，是因为——。该题为细节题。根据文章最后一段，我们得知遗传学家们从每具木乃伊的不同位置提取组织是为了避免被研究人员自身的DNA污染标本。