What influence does alcohol have on driving ability?

Answer: B — It impairs judgment and reflexes

Alcohol significantly impairs judgment and reflexes, which are critical for safe driving. When a person consumes alcohol, it affects the central nervous system and can lead to decreased cognitive functions. This impairment includes a reduction in the ability to make sound decisions, as alcohol can cloud one's judgment and make it harder to assess situations accurately. Additionally, reflexes are slowed, meaning a driver may not react as quickly to sudden changes on the road, such as a pedestrian stepping into the street or a vehicle stopping abruptly. This combination of impaired judgment and delayed reaction times increases the risk of accidents and makes driving under the influence extremely dangerous.