When backing up a large vehicle, you should
- use someone as a guide if possible.
- sound your horn.
- avoid backing into the blind (passenger) side.
- do all of the above. ✓
Answer: D. do all of the above.
When backing up a large vehicle, you should do all of the above: use a guide if possible, sound your horn, and avoid backing into the blind side.
Why this is the answer
The handbook gives all three as backing-up practices. It says to use a person to guide you whenever possible, and to sound the horn at least once every vehicle length to warn other road users you are about to move. It also says not to back into the blind side when you can back into the view side instead. Since each of these appears in the official tips, the choice that covers all of them is the right one.
Why the other answers are wrong
- A. use someone as a guide if possible. — Using a guide is only one of the handbook's backing-up tips, so picking it alone leaves out sounding the horn and avoiding the blind side.
- B. sound your horn. — Sounding the horn is only one of the recommended practices, so it does not cover the guide or the blind-side rule.
- C. avoid backing into the blind (passenger) side. — Avoiding the blind side is real handbook advice, but it is only one part of the full set of backing-up tips.
Remember it
If you can't see it, don't back into it: get a guide, sound the horn each vehicle length, and choose the view side over the blind side.