Before you drive, you should
- adjust your mirrors.
- adjust your head restraint.
- buckle up.
- do all of the above. ✓
Answer: D. do all of the above.
Before you drive, you should do all of the above: adjust your mirrors, adjust your head restraint, and buckle up.
Why this is the answer
The commercial driving handbook says to wear your seatbelt even in a vehicle with airbags, because an airbag can hurt someone who is not belted. It also says to adjust a head restraint to fit correctly, which helps lower the chance of neck and back injury in a rear-end crash. For mirrors, the handbook says they must be properly adjusted to give the view they are meant to show. Since each action is covered, the choice that includes all three is the right one.
Why the other answers are wrong
- A. adjust your mirrors. — Adjusting only your mirrors leaves out the head restraint and seatbelt steps that the handbook also calls for.
- B. adjust your head restraint. — Adjusting only your head restraint skips mirror adjustment and buckling up, which the passages also support.
- C. buckle up. — Buckling up alone is not enough because the handbook also covers setting mirrors and head restraints properly.
Remember it
Use a three-point pre-drive check: see with mirrors, support with the head restraint, secure with the seatbelt.