What behavior might indicate reckless driving?

Answer: B — Driving while fatigued

Driving while fatigued is a behavior that can significantly impair a driver's reaction time and decision-making capabilities, creating a dangerous situation on the road. Fatigue affects one's alertness and concentration, which can lead to reckless driving actions such as swerving, a lack of attention to traffic signals, or not maintaining a safe distance from other vehicles. As such, this behavior poses a risk not only to the fatigued driver but also to other road users, and it falls under the definition of reckless driving due to the high potential for causing accidents. On the other hand, behaviors like stopping at red lights, making complete stops at intersections, and adjusting mirrors before driving are all indicative of responsible and law-abiding driving practices. These actions demonstrate adherence to traffic laws and the driver’s attentiveness to ensuring safety on the road, which are the opposite of reckless behavior.