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
Healing of of bone is affected by: 
Select and explain. 
A. Micromovement, B. Muscle interposition, C. Hypoxia, D. All
D: All
Answer: D: All 
Explanation: A i.e. Micromovement; B i.e. Muscle interposition; C i.e. Hypoxia