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: Surgery
[{'content': 'The addition of hyaluronidase to a local anesthetic solution might \nSelect and explain. \nA. Increase the duration of anesthesia, B. Limit the area of anesthesia, C. Reduce bleeding, D. Enhance diffusion of local anesthetic', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]