Which of the following statements about alcohol and driving is true?

One drink can impair driving is true because alcohol affects various cognitive and physical functions even at low levels. Consuming just a small amount of alcohol can slow reaction times, impair judgment, and reduce coordination, all of which are crucial for safe driving. This means that even after consuming what might seem like a negligible amount, a driver's ability to operate a vehicle safely may be compromised.

In contrast, the other statements contain inaccuracies. Alcohol does significantly affect reaction time; therefore, the first statement is false. The idea that drinking coffee will sober someone up is a common myth; coffee may make a person feel more alert but does not eliminate alcohol from the body, thus the third statement is incorrect. Lastly, consuming food can slow the absorption of alcohol but does not prevent impairment from already consumed alcohol, making the fourth statement misleading. Overall, understanding that even one drink can impair driving is critical in promoting safety on the roads.