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': 'Compared to a cast circumferential clasp, the main disadvantage of a combination clasp is that, it? \nSelect and explain. \nA. Can flex in all spatial planes, B. is more prone to breakage and damage, C. makes greater surface contact with the tooth, D. is less acceptable esthetically', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]