**Core Concept**
The formation of salivary gland stones, also known as sialolithiasis, is a common condition affecting the salivary glands. These stones typically form due to the accumulation of calcium salts and other minerals in the saliva, which can lead to the development of a hard, stony mass within the gland.

**Why the Correct Answer is Right**
The majority of salivary gland stones occur in the submandibular gland, which is the largest of the salivary glands. This is due to the higher concentration of calcium salts in the saliva of the submandibular gland, as well as the slower flow rate of saliva through this gland. The stones typically form in the duct of the submandibular gland, which is a narrow, tortuous channel that can trap mineral-rich saliva and promote stone formation.

**Why Each Wrong Option is Incorrect**
* **Option A:** The parotid gland is a common site for salivary gland tumors, but it is not the most common site for stone formation.
* **Option B:** The sublingual gland is a smaller salivary gland located under the tongue, and while it can be affected by sialolithiasis, it is not the most common site for stone formation.
* **Option D:** The minor salivary glands are scattered throughout the oral cavity and can be affected by sialolithiasis, but they are not the most common site for stone formation.

**Clinical Pearl / High-Yield Fact**
The submandibular gland is the most common site for salivary gland stones due to its high concentration of calcium salts and slower flow rate of saliva, making it a key area to consider in patients presenting with symptoms of sialolithiasis.

**Correct Answer:** C.