An organic disorder whose symptoms tend to develop gradually and worsen over time is dementia.That is option D.
What is organic disorder?
An organic disorder is a mental disturbance that can affect the brain cells as well as causes hormonal abnormalities.
Examples of organic disorders are:
Dementia is an organic disorder that causes an impaired ability to remember, think, or make decisions that interferes with doing everyday activities. This is a long term organic disorder unlike delirium which is short term.
Learn more about mental disorders here:
https://brainly.com/question/933852
