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': 'In child development, the embryo period is? \nSelect and explain. \nA. 0-2 weeks, B. 2-3 weeks, C. 2-8 weeks, D. 9 weeks to birth', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]