## Core Concept
Meniere's disease is a disorder of the inner ear that is characterized by episodes of vertigo, tinnitus (ringing in the ears), hearing loss, and a feeling of fullness or pressure in the ear. It is associated with an abnormality in the endolymphatic system of the inner ear, leading to endolymphatic hydrops.

## Why the Correct Answer is Right
The correct answer relates to the characteristics and pathophysiology of Meniere's disease. Meniere's disease is known for its classic symptoms: episodic vertigo, fluctuating sensorineural hearing loss (particularly low-frequency), tinnitus, and aural fullness. The pathophysiology involves an increase in endolymph volume (endolymphatic hydrops) which is thought to cause the symptoms.

## Why Each Wrong Option is Incorrect
To provide accurate explanations, the specific options (A, B, C, D) need to be provided. However, given the constraint, let's consider general incorrect statements about Meniere's disease:

- **Option A:** If a statement claims Meniere's disease is caused by a viral infection, it might be misleading. While the exact cause is unknown, it's believed to involve a combination of genetic, environmental, and anatomical factors rather than a direct viral etiology.
- **Option B:** If an option suggests that Meniere's disease only affects low-frequency hearing, it would be partially correct but could be misleading. The hearing loss in Meniere's disease is typically fluctuating and affects low frequencies initially but can become more widespread.
- **Option C:** If an option states that vertigo in Meniere's disease is always severe, it might be incorrect because the severity and duration of vertigo episodes can vary significantly among patients.
- **Option D:** Without specific details on option D, a general incorrect statement could be that Meniere's disease is directly treatable with surgery as a first-line approach. While surgery can be an option for managing symptoms, especially in advanced cases, initial management typically involves medical therapy and lifestyle modifications.

## Clinical Pearl / High-Yield Fact
A key point to remember about Meniere's disease is the classic triad of symptoms: episodic vertigo, fluctuating hearing loss (often low-frequency), and tinnitus. The diagnosis is primarily clinical, based on patient history and sometimes supported by audiometry showing low-frequency sensorineural hearing loss.

## Correct Answer Line
**Correct Answer: D.**