How can a driver use the side mirrors to judge off-tracking while completing a turn?

Pick an answer

1. Mirrors cannot show anything useful about off-tracking at all, only forward visibility actually helps a driver
2. By watching the trailer's rear wheels in the mirror to see how closely they track the curb or lane markings during the turn
3. By checking the mirror only after the turn is finished
4. By watching the front bumper's distance from the curb instead of the trailer

Correct!

Not quite. The correct answer is highlighted.