People under the influence of drugs may exhibit which of the following?

Individuals under the influence of drugs often display noticeable changes in their speech patterns. This can manifest in a variety of ways, such as slurring, rapid speech, or incoherence, depending on the type of drug consumed. These alterations can be indicative of the impact that substances have on the brain and nervous system, affecting motor control and the ability to articulate thoughts clearly.

In contrast, the other options suggest states of functioning that are generally not associated with substance intoxication. For instance, consistent concentration and focus, emotional stability, and enhanced cognitive abilities are typically compromised when a person is under the influence of drugs, as these substances often impair judgment, motor skills, and the overall cognitive function of an individual. Thus, recognizing the change in speech patterns serves as an important indicator of drug influence.