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
In child development, the embryo period is? 
Select and explain. 
A. 0-2 weeks, B. 2-3 weeks, C. 2-8 weeks, D. 9 weeks to birth
C: 2-8 weeks
Answer: C: 2-8 weeks 
Explanation: None