What can excessive fatigue lead to when driving?

Answer: B — Slower reaction times and poor decision making

Excessive fatigue can significantly impair a driver's ability to operate a vehicle safely. When a person is overly tired, their cognitive functions, such as reaction time and decision-making abilities, are negatively impacted. Fatigue can slow down how quickly a driver can respond to unexpected situations, such as sudden stops or changes in traffic flow. It also decreases the driver's ability to make sound decisions, such as when to change lanes or assess potential hazards on the road. This lack of alertness and diminished mental capacity can lead to serious driving errors, increasing the risk of accidents. In contrast, improved concentration, increased alertness, and enhanced problem-solving skills would typically result from being well-rested, making those options unlikely outcomes of fatigue.