Before you move into another lane, which set of steps should you follow?
Correct answer: Signal, check your mirrors, and glance over your shoulder.
Answer options
ASignal, check your mirrors, and move over right away
BSignal, glance over your shoulder, and move over right away
CSignal, check your mirrors, and glance over your shoulder Correct
Why
As the picture shows, your mirrors leave blind spots on both sides of the car, so after signaling and checking the mirrors you still need a quick look over your shoulder. Leaving out either the mirror check or the shoulder check can leave a nearby vehicle unseen.