This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Wound Healing, Subject name: Pathology
Wound contraction is mediated by? 
Select and explain. 
A. Epithelial cell, B. Myofibroblasts, C. Collagen, D. Elastin
B: Myofibroblasts
Answer: B: Myofibroblasts 
Explanation: Wound contraction is initially caused by myofibroblasts and later by cross-linking of collagen fibers.