Reaction time is slower after:
- Drinking alcohol. ✓
- Sleeping.
- Working hard.
Answer: A. Drinking alcohol.
Reaction time is slower after drinking alcohol.
Why this is the answer
The handbook says DUI laws cover alcohol and drugs, and it warns that these substances can affect your ability to drive safely and react to what you see and hear. It also says it is illegal to drive after drinking excessive amounts of alcohol because it impairs driving. Of the choices given, drinking alcohol is the one the handbook ties to reduced ability to react.
Why the other answers are wrong
- B. Sleeping. — Sleeping is not described in the passages as something that slows your reaction time; the handbook discusses alcohol and drugs affecting your ability to react.
- C. Working hard. — Working hard is not mentioned in the passages as impairing reaction time; only alcohol and drugs are described as affecting your ability to drive and react.
Remember it
Ask yourself whether it changes how you see, hear, and react; the handbook puts alcohol and drugs in that group.
Official handbook: California Driver Handbook (DL 600), Section 9: Alcohol and Drugs, p. 72