On the road1 of 3
What should you scan while driving a bus?
The answer
Answer: A. You may have to remind riders about rules, or to keep arms and heads inside the bus. Watching only the road, only the interior or only the left mirrors would miss either the traffic or the riders, so you scan the road ahead, the sides, the rear and the interior of the bus.
Source: 4.3.1 - Passenger Supervision