Which of these statements is true about drinking alcohol and driving?
- If you can walk in a straight line after drinking, it is safe to drive.
- If you are under the legal blood alcohol concentration limit, your driving isn't impaired.
- Alcohol affects judgement, which is needed to drive safely. ✓
Answer: C. Alcohol affects judgement, which is needed to drive safely.
The true statement is that alcohol affects judgement, which you need to drive safely.
Why this is the answer
The handbook says a BAC under the legal limit does not make driving safe. It also says most people notice bad effects from alcohol at levels below that limit, and a single drink can change how well you drive. The passage does not use the word judgement, but it links alcohol to the abilities safe driving requires. That makes the statement about judgement the supported choice.
Why the other answers are wrong
- A. If you can walk in a straight line after drinking, it is safe to drive. — Walking in a straight line is not a test the handbook gives for safe driving, and the passages say a single drink can affect your driving.
- B. If you are under the legal blood alcohol concentration limit, your driving isn't impaired. — The handbook says a BAC below the legal limit does not make driving safe because many people feel negative effects below that limit.
Remember it
A legal BAC is a limit, not a promise that you are fit to drive.
Official handbook: California Driver Handbook (DL 600), Section 9: Alcohol and Drugs, p. 73