Which of the following is a characteristic sign of alcohol or depressant use?

Slurred speech and disorientation are indeed characteristic signs of alcohol or depressant use. These substances have a depressant effect on the central nervous system, which can impair motor function and cognitive abilities. When someone consumes alcohol or certain depressants, their muscle coordination and speech can become affected, leading to slurred words and unclear articulation. Additionally, disorientation may manifest as confusion about time, place, or personal identity, which is common with substances that depress brain activity.

In contrast, clear and focused speech, increased motivation, and consistent energy levels are not typical indicators of alcohol or depressant use. These symptoms might be more associated with stimulant use or other states of heightened alertness. Understanding these signs is crucial in recognizing the effects of substance use and can help in assessing an individual's fitness for duty.