**Core Concept**
The question is testing the management of a patient with a buccal mucosa growth, which is likely to be a type of oral cancer. The correct line of treatment depends on the stage of the cancer, which can be determined by the size of the primary tumor and the presence of lymph node metastases.

**Why the Correct Answer is Right**
Given the size of the primary tumor (3 cm) and the presence of multiple ipsilateral lymph nodes (each < 3 cm), this patient likely has stage III oral cancer. The correct treatment for stage III oral cancer is a combination of surgery and radiation therapy. The primary tumor should be resected, and the lymph nodes should be treated with radiation therapy to prevent further spread of the cancer. This approach is known as chemoradiation. **Why Each Wrong Option is Incorrect** **Option A:** This option is incorrect because it does not mention the need for radiation therapy, which is essential in the treatment of stage III oral cancer. **Option B:** This option is incorrect because it does not specify the need for surgery, which is required to resect the primary tumor. **Option C:** This option is incorrect because it does not provide a comprehensive treatment plan, which should include both surgery and radiation therapy. **Clinical Pearl / High-Yield Fact** When managing oral cancer, it is essential to consider the stage of the cancer and the presence of lymph node metastases. The TNM staging system is used to determine the stage of oral cancer, which guides treatment decisions. **Correct Answer:** C.