It is illegal to overtake and pass
Answer: A — stopped school bus when its red lights are flashing.
Passing a stopped school bus when its red lights are flashing is illegal because it puts the safety of children at risk. The other options are not necessarily illegal because there may be specific traffic laws or signals that allow for overtaking in those situations. However, it is important to always be cautious and follow traffic laws to ensure the safety of yourself and others on the road.