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': 'Cortisol level returns to normal after haemorrhage \nSelect and explain. \nA. 2 weeks, B. 10 days, C. 7 days, D. 3 days', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]