Look at the zones marked in the picture. Which routine covers both the mirror areas and the blind spots when you switch lanes?
Correct answer: Signal, check the mirrors, then glance quickly over your shoulder.
Answer options
ASignal and glance over your shoulder, but never use the mirrors
BSignal and check the mirrors, but never turn your head
CSignal, check the mirrors, then glance quickly over your shoulder Correct
Why
Mirrors show the green zones, but the red blind spots beside the car stay hidden unless you turn your head. Signaling first warns other drivers, the mirror check covers the space behind you, and the shoulder glance covers what the mirrors miss.