Answer: c. fibroblast
Step-by-step explanation:
Fibroblasts are the most common cells in the connective tissue proper. The fibroblasts are elongated or stellate, with long extensions, euchromatic nucleus and one or two prominent nucleoli. The rough endoplasmic reticulum and Golgi complex are well developed because they synthesize the components of the extracellular matrix: collagen fibers, reticular fibers, elastic fibers, and the fundamental substance. They also produce growth factors that control cell proliferation and differentiation.