**Core Concept**
The management of transitional cell carcinoma (TCC) of the bladder involves a multidisciplinary approach, including surgical, chemotherapeutic, and radiotherapeutic options. The choice of treatment depends on the stage and grade of the tumor, as well as the patient's overall health and performance status.

**Why the Correct Answer is Right**
For a patient with stage T2 TCC of the bladder, which is a locally advanced tumor that invades the muscle layer of the bladder, radical cystectomy (surgical removal of the bladder) is generally considered the standard treatment. This is because T2 tumors have a high risk of recurrence and metastasis, and surgical removal of the bladder is often necessary to achieve a cure. Additionally, radical cystectomy may be combined with chemotherapy or radiotherapy to improve outcomes.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because partial cystectomy (removal of only the affected portion of the bladder) is typically reserved for patients with small, low-grade tumors that are confined to the mucosa or submucosa, and is not suitable for a patient with a T2 tumor.

**Option B:** This option is incorrect because intravesical therapy (direct instillation of chemotherapy or immunotherapy into the bladder) is typically used for patients with non-muscle-invasive bladder cancer (Ta, T1), and is not effective for patients with muscle-invasive tumors like T2.

**Option C:** This option is incorrect because radiotherapy alone is not sufficient for a patient with T2 TCC of the bladder, as it may not provide adequate local control and is often used in combination with surgery or chemotherapy.

**Option D:** This option is incorrect because neoadjuvant chemotherapy (chemotherapy given before surgery) may be considered for patients with muscle-invasive bladder cancer, but is not the primary treatment for a patient with a T2 tumor.

**Clinical Pearl / High-Yield Fact**
The American Joint Committee on Cancer (AJCC) staging system is used to classify bladder cancer based on the depth of invasion and the presence of lymph node or distant metastases. Understanding the AJCC staging system is crucial for determining the appropriate treatment plan for patients with bladder cancer.

**Correct Answer:** C.