Severe, prolonged depression affects a person's risk for physical illness by

A. Dementia is not typically caused by sudden environmental changes. Instead, it is a chronic condition that develops gradually over time due to neurodegenerative diseases, such as Alzheimer's disease, vascular dementia, or Lewy body dementia.
B. Dementia is characterized by a gradual decline in cognitive function, including memory, thinking, and reasoning skills. The progression of dementia is typically slow and leads to worsening symptoms over time. Currently, most types of dementia are considered irreversible, meaning that the damage to the brain is not reversible and the condition will continue to progress.
C. Dementia is a progressive condition that develops gradually, often over months or years. It is not characterized by a sudden onset. Sudden onset of cognitive symptoms is more indicative of delirium, which can be caused by acute medical conditions or other factors.
D. Dementia generally does not involve an altered level of consciousness. Instead, it primarily affects cognitive functions such as memory, reasoning, and orientation while consciousness remains clear.

A. A physical disease, especially a chronic one, can significantly impact a person's physical and mental well-being, leading to a decline in functional capacity.
B. While crises can be challenging, they are often temporary and do not necessarily lead to a long-term decline in functional capacity.
C. While a support system is crucial for overall well-being, its absence does not always lead to a significant decline in functional capacity. Many people can cope with challenges without a formal support system.
D. While essential for overall health, nutritional deficits typically lead to a gradual decline in functional capacity unless they are severe and prolonged.