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': 'In canine protected occlusion, the reason of choosing canine is/are \nSelect and explain. \nA. Long roots, B. Good crown to root ratio, C. Surrounded by dense compact bone which tolerates forces better, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The canine is chosen because of its\xa0\n\nLong roots\nGood crown to root ratio\nSurrounded by dense compact bone which tolerates forces better.\xa0\nLocation is far from the TMJ thus receiving less stress.', 'role': 'assistant'}]