Which of the following substances can affect the ability to drive?
- Tranquilizers, marijuana, and sedatives.
- Cough syrups and cold tablets containing codeine or antihistamines.
- All of the above. ✓
Answer: C. All of the above.
Tranquilizers, marijuana, sedatives, and cough syrups or cold tablets with codeine or antihistamines can all affect driving, so all of the above is correct.
Why this is the answer
The handbook says DUI law covers alcohol and drugs, and it makes no distinction between illegal drugs and medications from a doctor or pharmacy. It specifically says cough syrup can be a problem and that prescription and over-the-counter medicines can make you an unsafe driver. Because the law applies to any drug that affects your ability to drive safely, the drugs named in the other choices are covered too, including sedatives, tranquilizers, marijuana, codeine, and antihistamines. That is why the choice that includes every listed substance is the right one.
Why the other answers are wrong
- A. Tranquilizers, marijuana, and sedatives. — This choice names some drugs but leaves out cough syrups and cold tablets with codeine or antihistamines, which the handbook also treats as medicines that can affect driving.
- B. Cough syrups and cold tablets containing codeine or antihistamines. — This choice covers cough and cold products but leaves out tranquilizers, marijuana, and sedatives, which are also drugs that can affect driving under the handbook's rule.
Remember it
Any drug that changes how you react belongs in the same warning, whether it comes from a pharmacy or not.