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 an-8-year-old child there is insufficient space in the
upper anterior segment for the upper permanent lateral incisors to erupt. Treatment is: 
Select and explain. 
A. Disk the proximal surface of maxillary incisors, B. Disk deciduous canines and first molars, C. Extract the deciduous 1st molars, D. No treatment required but observe
B: Disk deciduous canines and first molars
Answer: B: Disk deciduous canines and first molars 
Explanation: None