Sundowner's Syndrome is characterized by:

Sundowner's Syndrome, also known as sundowning, refers to a phenomenon often seen in individuals with cognitive impairments, particularly those with dementia or Alzheimer's disease. It is characterized by an increase in confusion, agitation, and activity levels that occur during the late afternoon and into the evening as daylight fades.

The correct answer highlights that individuals with Sundowner's Syndrome experience an increase in activity and disorientation after dark. This can sometimes manifest as heightened anxiety or restlessness, making it more challenging for caregivers to manage these behaviors during nighttime hours. This phase of increased activity is often puzzling and can be distressing for both the individual and their caregivers, leading to the need for specific strategies to help soothe and manage symptoms.

The other choices suggest behaviors that do not align with the typical manifestation of this syndrome. For instance, increased activity during the day or behavioral stability at night would not accurately describe the sundowning phenomenon, which specifically indicates a downturn in stability and an uptick in activity levels as the day ends. Similarly, reduced energy levels in the evening contradicts the very essence of Sundowner's Syndrome, as the syndrome is marked by heightened activity and potentially disruptive behaviors during the nighttime hours.