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
The permanent maxillary first molar of a 8 yr old child is to be extracted because of caries. The case can be maintained to prevent malocclusion is by 
Select and explain. 
A. Placing a space maintainer, B. Surgically reposition the 2nd molar, C. Let second molar erupt and drift mesially to close the space, D. Extract first molar on the other side to prevent midline shifting
C: Let second molar erupt and drift mesially to close the space
Answer: C: Let second molar erupt and drift mesially to close the space 
Explanation: None