Cultural group I think. Its the most logical :)
I believe it will be they could choke on the water or by taking in so much at a time at a fast pace will give them cramps.
The three (3) correct answers are:
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[A]: "Avoid using illegal substances."
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[C]: "Let someone known where you will be."
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[D]: "Be alert."
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<u>Note</u>: Choice [B]: "Be flexible with your limits." ; is INCORRECT. To the contrary, one should be FIRM with one's limits.
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A. Magnesium is underconsumed.
