What should you not assume when passing another vehicle?

Answer: B — That it is clear to return to your lane

When passing another vehicle, it is crucial not to assume that it is clear to return to your lane. This is because visibility conditions can vary, and there may be other vehicles or obstacles that are not immediately apparent. Factors such as blind spots, the positioning of the other vehicle, and the speed of oncoming traffic can all influence whether it is safe to merge back into your lane. Making an assumption in this situation can lead to dangerous driving conditions and potentially result in an accident. Being aware of your surroundings, scanning for other vehicles, and using your mirrors effectively is essential for ensuring that it is safe to return to your lane after passing. This emphasizes the importance of caution and taking the time to confirm that the lane change can be made safely rather than relying on assumptions.