Which of the following best describes 'standard drink' equivalency in the US?
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A
12 oz beer, 5 oz wine, and 1.5 oz 80-proof spirits all contain about the same amount of pure alcohol
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B
12 oz beer contains more alcohol than 5 oz wine
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C
A standard drink is always 8 oz regardless of beverage type
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D
Only distilled spirits are measured in standard drink units