When stopping to unload passengers from a school bus, you should ensure a clear view of the road for at least how far?

Answer: B — 150 metres

When stopping to unload passengers from a school bus, it is important to ensure a clear view of the road for at least 150 metres. This is because a school bus needs more stopping distance than a car due to its larger size and weight. A distance of 150 metres will give the bus driver enough time to see and react to any potential hazards on the road, ensuring the safety of the passengers. Option A and C may still provide an adequate view of the road, but it is recommended to have a longer distance for added safety. And option D of 50 metres is too short and does not provide enough time for the driver to react to any potential hazards.