Which of the following indicates good judgment according to AR 600-55?

Good judgment in the context of AR 600-55 encompasses a combination of factors that reflect a person's driving experience and safety record. Each of the aspects listed contributes to an individual's ability to make sound decisions while operating a vehicle.

Being 21 years of age or older is significant because it often aligns with greater maturity and responsibility, qualities that are essential in a driver. Additionally, having at least one year of driving experience suggests that the individual has had adequate time to develop essential driving skills and decision-making aptitude in various conditions.

Furthermore, having no accidents over 4,000 miles driven demonstrates a strong safety record, implying that the individual is not only skilled but also cautious, further indicating good judgment.

When considered together, these factors collectively provide a comprehensive indication of good driving judgment, making the inclusion of all of them the most accurate representation of what constitutes good judgment as outlined in AR 600-55.