Before reversing your bus, you should...?

Answer: B — disembark and check all around the vehicle

When reversing a bus, it is important to thoroughly check the surroundings and ensure that there are no obstacles or safety hazards in the way. Honking three times, accelerating quickly then braking, and asking a passenger to guide you are not safe or effective methods for reversing a bus. Honking may not alert all pedestrians or other vehicles, quickly accelerating can cause loss of control, and having a passenger guide you may lead to miscommunications and errors. It is best to disembark and physically check for any potential dangers before reversing the bus.