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: Dental
Bone blending is a technique employed for 
Select and explain. 
A. Transplanting cortical bone, B. Transplanting cancellous bone, C. Transplanting a mix of cancellous bone and hydroxyapatite crystals, D. Transplanting resorbable hydroxyapatite crystals only
A: Transplanting cortical bone
Answer: A: Transplanting cortical bone 
Explanation: None