What are common signs of drowsy driving?

Answer: A — Frequent yawning and heavy eyelids

Frequent yawning and heavy eyelids are recognized as common signs of drowsy driving because they directly indicate a person's struggle to stay awake and alert. Yawning is a natural physiological response that often occurs when someone is fatigued, as the body attempts to increase oxygen intake and stimulate the brain. Heavy eyelids suggest that the individual is having difficulty keeping their eyes open, which is a clear sign that they are not fully attentive to the road. Recognizing these signs is crucial for driver safety, as drowsiness greatly impairs reaction times and decision-making abilities, increasing the risk of accidents.