How does alcohol affect driving performance?

Alcohol significantly affects driving performance by impairing various cognitive and motor skills critical for safe driving. When consumed, alcohol acts as a depressant that can slow down the central nervous system. This results in impaired judgment, reduced reaction times, diminished coordination, and a lowered ability to concentrate, all of which are crucial for responding effectively to driving conditions and potential hazards.

The correct choice recognizes that alcohol consumption leads to slower reaction times, which can have serious consequences on the road. Drivers under the influence are less likely to respond swiftly in emergencies, such as a sudden stop by the vehicle in front or a pedestrian entering the roadway unexpectedly. The decreased ability to react promptly can increase the risk of accidents.

In contrast, while other options may seem plausible, they do not reflect the actual effects of alcohol on performance behind the wheel. For instance, alcohol does not improve reaction times or enhance sensory perception, and asserting that it has no effect contradicts substantial research indicating that alcohol impairs driving abilities. Understanding these effects is crucial for making responsible choices about alcohol consumption and driving safety.