**Core Concept**
The preganglionic fibers of the parotid gland originate from the glossopharyngeal nerve (IX cranial nerve) and synapse in the otic ganglion. The postganglionic fibers then travel to the parotid gland to stimulate salivary secretion.

**Why the Correct Answer is Right**
The preganglionic fibers of the parotid gland are part of the parasympathetic nervous system, which is responsible for promoting salivation and digestion. The glossopharyngeal nerve carries these preganglionic fibers, which synapse in the otic ganglion. The otic ganglion is a small parasympathetic ganglion located near the foramen ovale, and it contains the cell bodies of the postganglionic neurons that innervate the parotid gland.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because the preganglionic fibers of the parotid gland do not originate from the facial nerve (VII cranial nerve).
* **Option B:** This option is incorrect because the preganglionic fibers of the parotid gland do not pass through the submandibular ganglion, which is related to the submandibular gland.
* **Option D:** This option is incorrect because the preganglionic fibers of the parotid gland do not pass through the superior cervical ganglion, which is related to the sympathetic nervous system.

**Clinical Pearl / High-Yield Fact**
The otic ganglion is a small, bean-shaped ganglion located near the foramen ovale, and it is an important landmark in the surgical approach to the parotid gland. The otic ganglion contains the cell bodies of the postganglionic neurons that innervate the parotid gland, and it is a key structure in the parasympathetic innervation of the parotid gland.

**Correct Answer:** C. Otic ganglion