Which issues do drunk drivers often exhibit?

Drunk drivers often exhibit problems maintaining proper lane position due to the impairing effects of alcohol on coordination and judgment. Alcohol consumption can significantly affect a person's motor skills and depth perception, making it difficult to navigate the vehicle within the lane markings. This impairment can lead to swerving, drifting, or abrupt movements that compromise road safety.

In contrast, the other choices are characteristics or conditions that are not associated with drunk driving. Exceptional focus and high levels of patience are typically attributes of a sober driver, while reverse intoxication effects, which imply a reduction of impairment after drinking, do not align with the physiological realities of alcohol consumption. Thus, the chosen answer accurately reflects the common behaviors and problems exhibited by individuals who are driving under the influence of alcohol.