Before DNA fingerprinting is used suspects ______ .A．would have to leave their fingerprin
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Before DNA fingerprinting is used, suspects ______ .
A．would have to leave their fingerprints for further investigations
B．could easily escape conviction of guilt
C．would have to submit evidence for their innocence
D．could be convicted of guilt as well
请帮忙给出正确答案和分析，谢谢！
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正确答案：B
解析：第二段首句提到，DNA指纹鉴定使罪犯调查发生了革命性的变化，它为调查员提供了新的强有力的工具来证明犯罪，而不仅仅是确定无罪。由此可推出，在没有DNA指纹鉴定之前，嫌疑犯很容易逃脱指控，故答案为[B]。