What is the significance of the 0.08% BAC legal per se limit in the context of DUI instructor education?
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A
It is the BAC at which all people become completely unable to drive
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B
It is the legally established threshold at which a driver is presumed impaired under US law, regardless of observed behavior
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C
It applies only to commercial vehicle operators under federal law
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D
It represents the BAC at which alcohol causes permanent brain damage