**Core Concept**
The sublingual gland is a minor salivary gland located under the tongue, which can be involved in various pathologic processes including neoplasms. Understanding the characteristics and behavior of sublingual gland tumors is essential for accurate diagnosis and management.

**Why the Correct Answer is Right**
Sublingual gland tumors are typically minor salivary gland neoplasms, and the majority are benign. These tumors can arise from the mucous glands of the sublingual gland and may present as painless swelling or masses under the tongue. The most common type of sublingual gland tumor is the pleomorphic adenoma, which is a type of benign mixed tumor. The clinical behavior of these tumors is generally indolent, and surgical excision is often curative.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe the typical behavior of sublingual gland tumors.
**Option B:** This option is incorrect because it does not specify the most common type of sublingual gland tumor.
**Option C:** This option is incorrect because it does not provide sufficient information to determine the accuracy of the statement.

**Clinical Pearl / High-Yield Fact**
It is essential to remember that sublingual gland tumors are often benign and can be effectively managed with surgical excision. However, accurate diagnosis requires a high index of suspicion and thorough clinical evaluation.

**Correct Answer:** D