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
[{'content': 'Buttressing bone formation is a \nSelect and explain. \nA. Process which is always peripheral, B. Occurs normally, C. Occurs when excessive occlusal forces are present, D. Process which is always endosteal', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]