Which of the following may indicate drug use during a DWI encounter?

The presence of alcohol containers is a significant indicator of potential drug or alcohol use during a DWI encounter. When law enforcement officers observe open or closed containers of alcohol within a vehicle or on a person, it suggests that the individual may have been consuming alcohol, which is directly related to impaired driving. This evidence can corroborate the officer's observations of the driver’s behavior or physical signs of impairment, making it a key factor in establishing the likelihood of driving while intoxicated.

In contrast, other options such as a positive demeanor, neat appearance, and successful multitasking do not necessarily correlate with drug use. A person may appear to be in good spirits or organized while still being under the influence of substances. These attributes can be misleading and do not serve as reliable indicators in assessing driving ability or impairment.