Why should you check your mirrors regularly while driving a combination vehicle, beyond watching for traffic?

Pick an answer

1. To confirm the trailer is tracking straight and not swaying or drifting
2. It's only useful for seeing the license plate is still attached
3. Mirrors on a combination vehicle are mainly for checking your own appearance
4. Checking mirrors is only necessary right before a lane change

Correct!

Not quite. The correct answer is highlighted.