Which of the following are signs of impairment due to alcohol?

The signs of impairment due to alcohol are characterized by specific physical and behavioral indicators. A strong smell of alcohol, slurred speech, and impaired coordination are well-documented symptoms associated with alcohol consumption. These signs can be readily observed in an individual who is intoxicated, indicating that their cognitive and motor functions are affected.

For instance, the strong smell of alcohol emanating from an individual serves as a clear external indicator of alcohol consumption. Slurred speech is a typical manifestation of impaired motor control affecting speech production, and compromised coordination often presents as difficulties in balancing or performing tasks that require fine motor skills. These three signs collectively point towards a level of impairment that can impact the individual's ability to function effectively in the workplace.

On the other hand, the other choices involve characteristics that do not indicate impairment. Increased energy and alertness, clear communication and focus, and enhanced problem-solving skills suggest the opposite of impairment, reflecting a level of cognitive and physical capability that is not associated with the sedative effects of alcohol. Therefore, the presence of strong physical signs and observable behaviors associated with impairment distinctly supports the identification of option A as the correct answer.