James R. Ehleringer tried to find outA．if our bodies break water down into its parts.B．if

James R. Ehleringer tried to find out

A．if our bodies break water down into its parts.

B．if it is possible to collect hair samples across the country.

C．if tap water contains unique proportions of isotopes of hydrogen and oxygen.

D．if the composition of hair can indicate exactly where people are from.

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