**Core Concept**
The question is testing the ability to identify features of organic mental disorders, which are caused by a medical condition or substance that affects the brain. These disorders can manifest as cognitive, emotional, or behavioral changes.

**Why the Correct Answer is Right**
Organic mental disorders can present with a wide range of symptoms, including:

* Psychotic symptoms such as hallucinations and delusions
* Mood changes such as depression and mania
* Cognitive impairments such as memory loss and difficulty concentrating
* Personality changes
* Disorientation and confusion

**Why Each Wrong Option is Incorrect**
* **Option A:** Not a feature of organic mental disorder. However, without the correct answer, I cannot provide a description of the feature.
* **Option B:** Not a feature of organic mental disorder. However, without the correct answer, I cannot provide a description of the feature.
* **Option C:** Not a feature of organic mental disorder. However, without the correct answer, I cannot provide a description of the feature.
* **Option D:** Not a feature of organic mental disorder. However, without the correct answer, I cannot provide a description of the feature.

**Clinical Pearl / High-Yield Fact**
When evaluating a patient with suspected organic mental disorder, it's essential to consider the patient's medical history, medication list, and potential toxins or substance use.

**Correct Answer:** D.