What must the driver of vehicle 2 do at the intersection?

Answer: B — Observe the right-of-way of vehicle 3

The driver of vehicle 2 must observe the right-of-way of vehicle 3 because it is essential for maintaining safety and order at intersections. When approaching an intersection, rules of right-of-way dictate which vehicle has priority to proceed first. This helps prevent collisions and ensures that traffic flows smoothly. By respecting the right-of-way of vehicle 3, the driver of vehicle 2 is making a responsible decision that aligns with road safety regulations and promotes courteous driving behavior. In general, it’s important for drivers to remain aware of other vehicles' positions and intentions, prioritizing safe interactions over rushing to move through intersections. This principle applies regardless of the specific layout or traffic signals present at the intersection.