The Centers for Disease Control and Prevention declared that medical intervention is needed when concentrations of lead in the blood are at or above 5 micrograms per deciliter (µg/dL).In Flint,most children with elevated blood levels of lead had values between _______________ µg/dL.

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The question states that medical intervention is needed when lead concentrations are at or above 5 µg/dL. Therefore, the children in Flint with elevated blood levels of lead must have values above 5 µg/dL. The only option that includes values above 5 µg/dL is C, which has a range of 5 to 9 µg/dL. Therefore, the best choice is C.

The Centers for Disease Control and Prevention Declared That Medical