The following is suggestive of an organic cause of the behavioral symptoms :
**Core Concept**
The question is testing the ability to differentiate between organic and functional causes of behavioral symptoms. Organic causes refer to underlying physiological or anatomical abnormalities, whereas functional causes are psychological in nature. The correct answer will indicate a condition that is more likely to have an underlying organic cause.
**Why the Correct Answer is Right**
The presence of a **fluctuating course** is suggestive of an organic cause of the behavioral symptoms. This is because fluctuating symptoms often indicate an underlying pathological process, such as a tumor, infection, or metabolic disorder, which can cause changes in behavior. For example, a brain tumor may cause personality changes, and these changes may fluctuate as the tumor grows or shrinks.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because a **stable course** is more typical of functional causes, which do not have an underlying organic cause.
**Option B:** This option is incorrect because **no other symptoms** are present, making it difficult to determine whether the behavioral symptoms have an organic or functional cause.
**Option C:** This option is incorrect because **family history** is not a reliable indicator of the cause of behavioral symptoms.
**Clinical Pearl / High-Yield Fact**
Fluctuating symptoms are a red flag for an underlying organic cause of behavioral symptoms, and a thorough investigation should be performed to rule out a pathological process.
**Correct Answer:** C.