Which personal habits could negatively impact a CMV driver's medical certification status?

The correct answer highlights habits that are well-documented to have detrimental effects on a person's overall health, particularly for Commercial Motor Vehicle (CMV) drivers. Smoking introduces harmful substances into the body, which can lead to respiratory issues and cardiovascular diseases. Excessive alcohol consumption can impair judgment, coordination, and reaction times, posing a significant risk not only to the driver but also to public safety on the road. Additionally, a lack of exercise contributes to various health problems, including obesity, diabetes, and hypertension, all of which can jeopardize a driver's medical certification status.

Maintaining a healthy lifestyle is crucial for CMV drivers because their job requires high levels of physical and mental fitness to ensure safe operation of heavy vehicles. Engaging in negative personal habits such as those mentioned can lead to findings during medical evaluations that may disqualify an individual from obtaining or maintaining the necessary medical certification.