Final answer:
All choices listed, including marijuana, stimulants, and over-the-counter medicine, can impair driving skills by altering mood, perception, and behavior.
Step-by-step explanation:
All of the choices listed - marijuana, stimulants, and over-the-counter medicine - can affect your driving skills. Psychoactive drugs influence the central nervous system and have the potential to alter mood, thinking, perception, and behavior. This is true for a variety of substances, including both legal and illegal drugs.
Stimulants like caffeine and amphetamines increase alertness but may also lead to reckless behaviors and overconfidence. Depressants, which include some prescription medications, can slow reaction times and decrease coordination. Even over-the-counter medicines can have side effects such as drowsiness or dizziness, thereby impairing driving ability. Operating a vehicle while under the influence of any drug that affects the brain can be dangerous and is often illegal.