Under what circumstances can you send text messages while driving your bus?

Answer: B — none

There is no option that allows for text messaging while driving a bus. It is illegal and extremely dangerous to use electronic devices while operating a vehicle. A Stopping at a red light does not mean it is safe to send a text message as it can still distract the driver from their surroundings. C: Voice-to-text technology may seem like a hands-free option, but it still requires the driver's attention and can be a source of distraction. D: Urgent messages can wait until the driver has safely pulled over and parked the bus. It is important to prioritize the safety of yourself and others on the road.