**Core Concept**
Squamous cell carcinoma (SCC) of the maxilla is a type of head and neck cancer characterized by uncontrolled growth of malignant squamous cells in the maxillary bone. Accurate staging is crucial for determining the most appropriate treatment plan.

**Why the Correct Answer is Right**
For a T3N0M0 staging, the tumor is locally advanced, with invasion of adjacent structures, but there is no lymph node involvement or distant metastasis. The treatment of choice for T3N0M0 maxillary SCC is **concurrent chemoradiation**. This involves the administration of chemotherapy and radiation therapy simultaneously to target both the primary tumor and any potential microscopic disease. The goal is to achieve a complete response, thereby preserving the patient's quality of life and minimizing the need for extensive surgery.

**Why Each Wrong Option is Incorrect**
**Option A:** Surgery alone may not be sufficient for T3 tumors, which often require more extensive resection and reconstruction.
**Option B:** Radiation therapy alone may not be enough to control the tumor, especially in the case of T3 tumors with invasion of adjacent structures.
**Option C:** Chemotherapy alone is not the standard treatment for locally advanced maxillary SCC, as it is often used in conjunction with radiation therapy.

**Clinical Pearl / High-Yield Fact**
When treating head and neck cancers, it's essential to consider the tumor's location, size, and stage, as well as the patient's overall health and performance status, to determine the most effective treatment plan.

**Correct Answer: C. Concurrent chemoradiation.**