**Core Concept**
The auditory system is responsible for detecting sound waves and transmitting auditory information to the brain. Auditory receptors, specifically the hair cells in the cochlea, play a crucial role in converting sound vibrations into electrical signals.

**Why the Correct Answer is Right**
Auditory receptors, or hair cells, are specialized mechanoreceptors located in the cochlea, a spiral-shaped structure within the inner ear. These hair cells contain stereocilia, which are tiny projections that bend in response to sound waves. This movement triggers a signaling cascade, ultimately leading to the activation of the auditory nerve and the transmission of auditory information to the brain. The correct location of these receptors is essential for sound processing and perception.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is not specified, so we cannot evaluate its correctness. However, we can discuss common locations of sensory receptors in the body:
* **Option B:** This is incorrect because the visual system, not the auditory system, is associated with the retina in the eye.
* **Option C:** This is incorrect because the olfactory system, responsible for smell, is associated with the olfactory epithelium in the nasal cavity.

**Clinical Pearl / High-Yield Fact**
It is essential to remember that the hair cells in the cochlea are responsible for sound processing and that damage to these cells can lead to hearing loss. This is a critical concept in otolaryngology and audiology.

**Correct Answer: C. Inner ear**