How many behaviors possibly indicate impairment if a driver exhibits drifting in and out of travel lanes, driving with no lights, and having expired tags?

The correct answer, which indicates three behaviors that possibly suggest impairment, is grounded in the distinct actions exhibited by a driver that could alert law enforcement to potential issues with their driving capability.

First, drifting in and out of travel lanes is a critical sign of impairment. It can indicate a lack of control or attentiveness, which is often linked to driving under the influence of substances or during moments of distraction.

Second, driving with no lights poses an additional concern regarding the driver's awareness and judgment. Proper use of vehicle lights is essential for visibility and communication with other road users. Failure to utilize lights can indicate a disregard for safe driving practices, which may correlate with impaired states.

Lastly, having expired tags raises questions about the driver's responsibility and attentiveness to legal vehicle operation, suggesting a possible lack of awareness. While not an immediate indicator of impairment, it contributes to the overall picture of a driver who may not be operating their vehicle within standard expectations.

Thus, considering these three behaviors collectively indicates impairment, supports the reasoning behind the selection of three as the appropriate answer. Each behavior reinforces the notion that the driver may be experiencing a cognitive or physical inability to operate their vehicle safely and responsibly.