The Environmental Protection Agency frequently puts mandatory controls on toxic substances that present as little risk as one in a million chances to cause cancer.
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Aas little risk as one in a million chances to cause
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Bas little risk as one chance in a million of causing
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Cas little risk as one chance in a million that it will cause
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Da risk as little as one chance in a million for causing
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Ea risk as little as one chance in a million for it to cause
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正确答案: B