Final answer:
The BAC limit that defines legal intoxication for individuals under 21 in many U.S. states is 0.02%. This lower limit is part of zero-tolerance laws to prevent underage drinking and driving.
Step-by-step explanation:
The subject of the question relates to the blood alcohol concentration (BAC) that defines legal intoxication for an individual under the age of 21 in the context of driving under the influence (DUI). In the United States, the standard BAC limit is 0.08% for individuals over the age of 21. However, for those under 21, many states have implemented a much lower BAC limit due to zero-tolerance laws aimed at discouraging underage drinking and driving.
The correct answer to this question is D) 0.02%. This is because the majority of states have adopted this lower limit for individuals under the age of 21, marking them as legally intoxicated if they exceed a BAC of 0.02%. The limit is quite stringent in order to deter any consumption of alcohol among underage drivers and lower the risk of accidents caused by impaired driving.