**Core Concept**
C-C beta chemokines are a subgroup of chemokines, which are small chemotactic cytokines that play a crucial role in the recruitment of immune cells to sites of inflammation. They are characterized by the presence of two adjacent cysteine residues near their amino terminus.

**Why the Correct Answer is Right**
C-C beta chemokines, such as MIP-1 beta (CCL4) and MIP-1 alpha (CCL3), are involved in the recruitment of monocytes, T cells, and eosinophils to sites of inflammation. They act by binding to specific receptors, such as CCR1 and CCR5, on the surface of immune cells. This binding triggers a signaling cascade that ultimately leads to the migration of these cells to the site of inflammation.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because C-C beta chemokines are a specific subgroup of chemokines, and this option does not specify which chemokine is being referred to.
**Option B:** This option is incorrect because C-C beta chemokines are involved in the recruitment of specific types of immune cells, such as monocytes and T cells, and this option does not accurately describe their function.

**Clinical Pearl / High-Yield Fact**
C-C beta chemokines are involved in the pathogenesis of various inflammatory and autoimmune diseases, including rheumatoid arthritis and multiple sclerosis. Understanding their role in these diseases is crucial for the development of targeted therapies.

**Correct Answer:** C. MIP-1 beta (CCL4) and MIP-1 alpha (CCL3).