**Core Concept**
The cervical stroma is a crucial component of the cervix, playing a vital role in its structure and function. It is primarily composed of connective tissue, which provides support and elasticity to the cervix.

**Why the Correct Answer is Right**
The cervical stroma is primarily made up of fibrous connective tissue, which includes collagen, elastin, and other extracellular matrix components. This tissue framework supports the cervical glands and provides a conduit for lymphatic and vascular supply to the cervix. The stroma also contains various cell types, including fibroblasts, macrophages, and lymphocytes, which contribute to its functional properties.

**Why Each Wrong Option is Incorrect**
**Option A:** Blood vessels and nerves are not the primary components of the cervical stroma, although they are present within it.
**Option B:** Smooth muscle cells are found in the cervix, but they are primarily located in the myometrium, which is a distinct layer from the stroma.
**Option C:** The cervical epithelium is a layer of epithelial cells that lines the surface of the cervix, but it is not part of the stroma.

**Clinical Pearl / High-Yield Fact**
The cervical stroma is an essential component of the cervix, providing structural support and facilitating the exchange of nutrients and waste products with the surrounding tissues.

**Correct Answer: C. Fibrous connective tissue.**