What are some signs that a friend may be unfit to drive?

The presence of difficulty walking and lack of coordination are strong indicators that a friend may be unfit to drive. These symptoms can suggest impairment due to alcohol consumption, drug influence, or other factors affecting motor skills and judgment. When someone exhibits trouble maintaining balance or navigating their movements, it raises significant concerns about their ability to operate a vehicle safely. These physical signals can affect their reaction time, decision-making ability, and overall ability to manage the complexities of driving, which all contribute to a heightened risk of accidents on the road.

The other options depict signs of normal functioning or mild behaviors that do not raise immediate concern about a person's driving capabilities. Clear speech and good coordination, calm demeanor and slow movements, as well as normal behavior and alertness suggest that the individual is likely capable of driving safely and effectively. Recognizing these critical signs is essential in promoting safety for everyone on the road.