In what ways can drugs impair driving ability?

Drugs can significantly impair driving ability by altering perception, motor skills, and reaction times, which are critical for safe driving. When a person's perception is affected, their ability to judge distances, speeds, and the movements of other vehicles and pedestrians becomes compromised. This can lead to dangerous driving situations.

Moreover, the motor skills necessary for operating a vehicle—such as steering, braking, and acceleration—can be negatively impacted by substance use, making it more difficult to control the vehicle accurately. Reaction times are also crucial; if a driver cannot respond quickly to sudden changes, like a pedestrian stepping into the road or a car braking in front of them, the likelihood of an accident increases dramatically.

In contrast to the correct option, some of the other choices suggest outcomes that contradict the effects of drugs on driving. For instance, enhancing reflexes and focus or improving decision-making skills are not outcomes associated with drug use; rather, they are typical expectations of sober, alert drivers. Similarly, increasing alertness and concentration implies an improvement in ability, which is also contrary to how most drugs impact cognitive and physical functions.