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': 'Scoring of palatal bar is \nSelect and explain. \nA. Limited to the area of soft displaced tissue, B. To increase the rigidity of the connector, C. Done on the entire posterior border of the bar, D. Done on the entire anterior border of the bar', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]