What distinguishes major neurocognitive disorder from mild neurocognitive disorder according to DSM-5?

Rationale: A. While neurocognitive disorders may have secondary emotional or behavioral effects (e.g., depression, anxiety, agitation), the defining distinction is cognitive impairment, not primarily emotional changes. B. Both major and mild neurocognitive disorders can be progressive, stable, or potentially reversible, depending on the underlying cause (e.g., medication effects, metabolic disturbances). Reversibility is not the defining factor between mild and major disorders. C. Major disorder is exclusive to older adults – Neurocognitive disorders can occur in adults of any age, although the prevalence increases with aging. Age is not a defining criterion in DSM-5. D. According to DSM-5, major neurocognitive disorder (previously termed dementia) is characterized by cognitive decline that significantly impairs independence in everyday activities, such as managing finances, medications, or self-care. In contrast, mild neurocognitive disorder involves modest cognitive decline that does not significantly interfere with independence, although some compensatory strategies may be needed.