Which of the following is a common disqualifying medical condition for drivers?

Severe cardiac disease is considered a common disqualifying medical condition for drivers, particularly in the context of commercial driving. The primary concern with severe cardiac disease is the potential for sudden incapacitation, which could jeopardize the safety of the driver and others on the road. Conditions such as congestive heart failure, unstable angina, or significant arrhythmias may lead to unpredictable cardiac events, making it risky for individuals with these conditions to operate a vehicle safely.

In contrast, mild hypertension typically does not disqualify individuals from driving, provided it is managed effectively with lifestyle changes or medication. Seasonal allergies and common colds are generally viewed as minor health issues and usually do not affect a person's ability to drive safely. They may cause discomfort but are unlikely to result in incapacitation or impaired judgment while driving. Thus, severe cardiac disease is clearly defined as a condition that can significantly impair a driver's ability to control a vehicle, leading to its disqualification status in commercial driving assessments.