Major and Mild Neurocognitive Disorders are associated with:

Major and Mild Neurocognitive Disorders are characterized primarily by significant cognitive decline, including memory impairment. This decline affects daily functioning and represents a notable decrease from previous levels of performance in cognitive domains such as attention, executive function, learning and memory, language, and perceptual-motor abilities.

In Major Neurocognitive Disorder, this cognitive deterioration is substantial enough to interfere with independence in everyday activities, while Mild Neurocognitive Disorder reflects a decline that, although noticeable, does not significantly impair independence. Memory impairment is particularly emphasized in these disorders, as individuals often struggle to recall information, keep track of ongoing events, or learn new information.

The other options do not accurately capture the defining features of these disorders. For example, exaggerated feelings of happiness, impulsivity, or focusing solely on physical incapacity do not relate to the cognitive declines and memory difficulties central to Major and Mild Neurocognitive Disorders. Hence, the focus on cognitive decline and memory impairment is what makes this answer the most appropriate in the context of these disorders.