Seawater may be used for drinking（）.<br>A:under no conditions<br>B:at a maximum rate of two ounces per day<br>C:if gathered during or immediately after a hard rain<br>D:after mixing with an equal quantity of fresh water

Seawater may be used for drinking（）.
A:under no conditions
B:at a maximum rate of two ounces per day
C:if gathered during or immediately after a hard rain
D:after mixing with an equal quantity of fresh water

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