**Core Concept**
The submandibular gland is a salivary gland located under the mandible, and stones (sialoliths) in this gland are relatively common. The formation of these stones is often related to the composition of saliva and the anatomy of the gland.

**Why the Correct Answer is Right**
The correct answer is not explicitly provided, but we can deduce the correct answer by analyzing each option. However, since we don't have the correct answer, let's assume the options and provide explanations for each.

**Why Each Wrong Option is Incorrect**
Since we don't have the actual options, let's create a hypothetical scenario and provide explanations for each:

* **Option A:** This option might be incorrect if it states that submandibular gland stones are less common than those in the parotid gland. However, submandibular gland stones are actually more common than parotid gland stones due to the higher concentration of calcium and the slower flow of saliva in the submandibular gland.
* **Option B:** This option might be incorrect if it states that submandibular gland stones are usually asymptomatic. However, most submandibular gland stones cause symptoms, such as pain, swelling, and difficulty swallowing.
* **Option C:** This option might be incorrect if it states that the most common location for submandibular gland stones is at the junction of the gland and the submandibular duct. However, stones often form within the gland itself, rather than at the ductal junction.
* **Option D:** This option might be incorrect if it states that the treatment for submandibular gland stones involves immediate surgical removal. However, treatment often starts with conservative measures, such as sialendoscopy or extracorporeal shock wave lithotripsy, before considering surgery.

**Clinical Pearl / High-Yield Fact**
A key point to remember is that submandibular gland stones are often associated with sialadenitis, an inflammation of the gland, which can be caused by infection or obstruction of the gland. Therefore, patients with submandibular gland stones should be evaluated for signs of sialadenitis and receive appropriate treatment.

**Correct Answer:**
(Note: Since the correct answer is not provided, I'll leave this section blank for now.)