What might you observe in someone who has consumed depressants?

When someone consumes depressants, their central nervous system activity is slowed, which can lead to notable physical and mental effects. One of the primary observations is sleepiness, as these substances often induce drowsiness and can make it difficult for the individual to stay awake. This state of sedation is a hallmark effect of depressants such as alcohol, benzodiazepines, and opioids.

Additionally, confusion is another characteristic effect, as depressants can impair cognitive functions and hinder the ability to think clearly or process information effectively. This confusion can result in disorientation or difficulty articulating thoughts and responses. Thus, the combination of sleepiness and confusion directly aligns with the typical symptoms observed in someone under the influence of depressants, making this the correct choice.

The other options reflect effects that are contrary to what depressants induce. For instance, energetic behavior and heightened reflexes are more commonly associated with stimulants, while improved focus and clarity can be seen with certain performance-enhancing drugs or stimulants, rather than depressants.