Which of the following can affect your driving ability?

Alcohol, cough syrups, and cold tablets can significantly impair your driving ability due to their effects on the central nervous system. Alcohol is well-known for its potential to reduce coordination, slow reaction times, and impair judgment. Cough syrups and cold tablets often contain ingredients like antihistamines, which can cause drowsiness or decreased alertness, making them dangerous when driving. Being aware of the influences of medications and substances on your ability to operate a vehicle is crucial for road safety.

Other options suggest that only illegal drugs or only alcohol have an impact on driving, which overlooks the fact that many legally available substances, including certain prescription medications and over-the-counter drugs, can also hinder your ability to drive safely. High blood pressure medications do not universally impair driving and are often safe; however, some can have side effects that might disrupt your focus or alertness but are not as commonly recognized for their risks compared to the substances in the correct answer. Therefore, option B comprehensively addresses the various substances that can affect driving skills.