**Core Concept**
Chronic Lymphocytic Leukemia (CLL) is a type of cancer characterized by the progressive accumulation of mature-appearing lymphocytes in the blood, bone marrow, and lymphoid organs. CLL treatment aims to control disease progression, alleviate symptoms, and improve quality of life.

**Why the Correct Answer is Right**
The treatment of CLL often involves a combination of approaches, including chemotherapy, targeted therapy, and immunotherapy. One of the key treatment modalities is chemoimmunotherapy, which combines chemotherapy with monoclonal antibodies to enhance the effectiveness of the treatment. For example, the combination of fludarabine, cyclophosphamide, and rituximab (FCR) has been shown to be highly effective in treating CLL. Rituximab, a monoclonal antibody, targets CD20-positive B cells, which are often overexpressed in CLL cells.

**Why Each Wrong Option is Incorrect**
**Option A:** This option may be incorrect because it does not specify the type of treatment or the mechanism of action. CLL treatment is complex and requires a tailored approach based on individual patient characteristics.
**Option B:** This option may be incorrect because it does not mention the role of immunotherapy in CLL treatment. Immunotherapy has emerged as a vital component of CLL treatment, particularly in combination with chemotherapy.
**Option C:** This option may be incorrect because it does not provide enough information to determine its accuracy. CLL treatment involves multiple modalities, and this option may be incomplete or misleading.

**Clinical Pearl / High-Yield Fact**
CLL treatment should be individualized based on the patient's age, performance status, and disease characteristics. The FCR regimen has been shown to be highly effective in treating CLL, but its use is limited by the risk of severe side effects, particularly in older patients.

**Correct Answer:** C.