When a school bus is stopped on a two-lane of four-lane highway and its red warning lights are flashing and its stop signal arm is extended, you must:
A. Stop before meeting or overtaking a school bus loading or unloading passengers on a two-lane highway.
B. You do not always need to stop when meeting a stopped school bus on a roadway with four or more lanes if at least 2 lanes of traffic travel in the opposite direction.
C. You do not need to stop if you are traveling on a four-lane highway in the opposite direction of a school bus, but you should drive cautiously.
D. All of the above