What actions may lead to disciplinary measures for students on a bus?

Answer: B — Disruptive behavior or unsafe actions

Disruptive behavior or unsafe actions are key factors that can lead to disciplinary measures for students on a bus. When students do not adhere to safety regulations or engage in activities that pose a risk to themselves or others, they jeopardize the safe environment required for transportation. This includes behaviors such as standing up while the bus is moving, shouting, or engaging in altercations with other students. Disciplinary actions are generally implemented to maintain a safe and orderly environment on the bus, ensuring that all students can travel without the threat of harm or distraction. This is critical not only for student safety but also for the driver's ability to focus on driving safely. In contrast, following safety rules, helping others with their seats, and waiting quietly at stops are all positive behaviors that contribute to a respectful and safe atmosphere on the bus.