Which of the following is a common sign of neurocognitive disorders?

The correct answer highlights that difficulty learning and retaining information is a common sign of neurocognitive disorders. Neurocognitive disorders encompass a range of conditions, including dementia, Alzheimer's disease, and other cognitive impairments that significantly affect thinking abilities. One of the primary characteristics of these disorders is the decline in cognitive functions, particularly in memory and learning. Individuals may struggle to remember new information, find it challenging to learn new skills, or forget previously learned information, which affects their daily functioning and independence.

In contrast, the other options suggest improvements or enhancements in cognitive or social abilities, which are not characteristics of neurocognitive disorders. Excessive clarity in recent memories and enhanced problem-solving skills imply a level of cognitive functioning that is typically contrary to the deterioration seen in these disorders. Increased social engagement might also suggest an improvement in social skills or mental health, which is not consistent with the profile of individuals experiencing neurocognitive decline. Overall, the emphasis on memory and learning difficulties as central features underscores the nature of neurocognitive disorders.