When should you return to your previous lane while completing a pass?

Question

Use your right turn signal before returning to the right lane after overtaking a vehicle. Return to your previous lane when you can see the entire passed vehicle in your rearview mirror.

Accepted Answer

When you can see the other vehicle's headlights in your rearview mirror

Answer

When the other vehicle signals for you to return to the lane

Answer

When you are directly next to the vehicle

Answer

When you sense that you are far enough ahead of the other vehicle