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': 'Most failures in maintaining adequate plaque removal results from failure in patient \nSelect and explain. \nA. Recalls, B. Training, C. Education, D. Motivation', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]