Which of the following scenarios is an example of impaired driving?

Answer: C — Driving when under the influence of alcohol or drugs

Driving when under the influence of alcohol or drugs clearly exemplifies impaired driving because both substances can significantly alter a driver's cognitive functions and physical abilities. This impairment affects critical driving skills, such as reaction time, coordination, judgment, and overall awareness of surroundings. These factors can lead to an increased risk of accidents, injuries, and fatalities on the road. In contrast, the other scenarios do not indicate impairment. Taking a short sleep may refresh a driver and enhance alertness, driving while feeling relaxed can contribute to a positive, focused state, and driving without distractions is generally encouraged for safe driving practices. None of these situations affect one's abilities in the same detrimental manner as alcohol or drugs.