**Core Concept**
The classification of lymph nodes is based on their location and the lymphatic drainage area they serve. Submandibular nodes are part of the cervical lymphatic system, which plays a crucial role in the drainage of the head and neck region.

**Why the Correct Answer is Right**
Submandibular nodes are classified as jugular lymph nodes, specifically the submandibular group. These nodes receive lymphatic drainage from the anterior two-thirds of the tongue, the floor of the mouth, and the submandibular gland. The lymph from these areas flows into the submandibular nodes, which then drain into the jugular trunk. This classification is essential in understanding the spread of infections and tumors in the head and neck region.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not accurately describe the classification of submandibular nodes.
**Option B:** This option is incorrect because it refers to a different group of lymph nodes, which are not directly related to the submandibular nodes.
**Option C:** This option is incorrect because it is a distractor and does not provide a valid classification for submandibular nodes.

**Clinical Pearl / High-Yield Fact**
It is essential to remember that the submandibular nodes are a common site for metastasis in head and neck cancers, particularly those originating from the tongue and floor of the mouth.

**Correct Answer:** C.