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: Physiology
[{'content': 'Haemopoietic stem cells differ from committed progenitor cells in bone marrow in : \nSelect and explain. \nA. Elaborate growth factors, B. Alter receptor to protein binding, C. Provide permanent structure, D. Provide long term reconstitution of bone marrow', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]