This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Which technique of facial fracture treatment involves purely closed reduction? 
Select and explain. 
A. Application of miniplates, B. Dynamic compression plating, C. Maxillo-mandibular fixation, D. Use of wire osteosynthesis across fracture site
C: Maxillo-mandibular fixation
Answer: C: Maxillo-mandibular fixation 
Explanation: None