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: Microbiology
[{'content': 'When transfer factor is given, treatment results in \nSelect and explain. \nA. Natural active immunity, B. Artificial active immunity, C. Artificial passive immunity, D. Adoptive immunity', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]