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': 'The main advantage of RPD over FPD in replacing bilateral lost teeth is \nSelect and explain. \nA. Cross arch stabilization, B. Aesthetics, C. Less expensive, D. Comfort to the patient', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]