A. All drivers should yield the right-of-way to public transit buses traveling in the same direction which have signaled and are reentering the traffic flow from a specifically designated pullout bay. B. All drivers should yield the right-of-way to public transit buses traveling in the opposite direction which have signaled and are reentering the traffic flow from a specifically designated pullout bay. C. All drivers must yield the right-of-way to public transit buses traveling in the same direction only if the bus has signaled and is reentering the traffic flow from a specifically designated school loading zone. D. all of the above