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': 'Stiffness is related to? \nSelect and explain. \nA. Resistance to elastic deformation, B. Degree of elastic deformation, C. Resistance to plastic deformation, D. Degree of plastic deformation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]