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': 'Movement of denture base was the least in patient with poor ridges, when \nSelect and explain. \nA. 20 degree teeth were used, B. 33 degree teeth were used, C. 0 degree teeth were used, D. Inverted cusp teeth were used', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]