Which of the following is an unacceptable behavior for drivers who may be DUI?

Frequent lane changes without signaling is deemed unacceptable behavior for drivers who may be intoxicated because it demonstrates a lack of attentiveness and impaired judgment, which are common consequences of driving under the influence. Such actions can pose significant risks not only to the driver but also to other road users, as unexpected lane changes can lead to collisions. Proper signaling is essential in allowing other drivers to anticipate your movements and maintain safety on the road. Unlike this behavior, options that embody responsible driving, such as maintaining speed limits and signaling when changing lanes, reflect an awareness of the rules of the road, which is critical for safe driving practices.