Which can qualify as an implied consent offense?

Answer: D — Both A and C

An implied consent offense refers to the legal principle that by operating a motor vehicle, a driver automatically consents to submit to certain tests, typically for alcohol or drug impairment, when requested by law enforcement. This concept is grounded in the idea that obtaining a driver's license implies a readiness to comply with laws governing road safety. Driving under the influence of legal medication can be classified as an implied consent offense because even if the medication is legally prescribed, operating a vehicle while impaired is still a violation of the law. Law enforcement can request chemical tests under these circumstances to assess the driver's impairment. Similarly, the law regarding underage drinking is strict, and any detectable level of alcohol in the blood of a driver under the age of 21 qualifies as a violation known as "zero tolerance." This means that any BAC (blood alcohol concentration) above zero is grounds for an implied consent offense. Therefore, both scenarios—driving under the influence of legal medication and having any amount of alcohol in the blood under the age of 21—fittingly classify as implied consent offenses, confirming that the combined answer is indeed correct.