**Core Concept**
The management of gallbladder carcinoma involves a multidisciplinary approach, taking into account the stage and extent of the disease. For early-stage gallbladder cancer, surgical resection with negative margins is the primary treatment.

**Why the Correct Answer is Right**
The patient has been diagnosed with T1a gallbladder carcinoma, which means the cancer is limited to the lamina propria without penetration into the muscularis layer. For T1a tumors, simple cholecystectomy (removal of the gallbladder) is considered sufficient treatment, as long as the margins are negative. This approach is based on the principle of oncologically safe resection, where the goal is to remove the tumor with a clear margin to prevent local recurrence.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is likely a distractor, as it does not specify the correct extent of surgical resection for T1a gallbladder cancer.

**Option B:** This option may be tempting, but it implies that more extensive surgery is required for T1a tumors, which is not the case.

**Option C:** This option might suggest a more aggressive approach, but it is not the standard management for T1a gallbladder cancer.

**Clinical Pearl / High-Yield Fact**
For T1a gallbladder cancer, the key to successful treatment is achieving negative margins with simple cholecystectomy. This highlights the importance of adequate surgical technique and pathological evaluation to ensure accurate staging and treatment planning.

**Correct Answer:** C. Simple cholecystectomy with negative margins is the appropriate management for T1a gallbladder cancer.