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
An 8 year old has 1st molar in a cusp-to-cusp relation. The treatment is: 
Select and explain. 
A. Fixed appliance, B. Removable appliance, C. Continuous recall and observe, D. None of the above
C: Continuous recall and observe
Answer: C: Continuous recall and observe 
Explanation: When the deciduous second molars are in a fIush terminal plane, the permanent first molar erupts initially into a cusp-to-cusp relationship, which later transforms into a Class I molar relation using the primate spaces.
Later, cusp-to-cusp relationship of the permanent first molar can be converted to a Class I relationship by the mesial shift of the permanent first molar following exfoliation of the primary molar and thus making use of the Leeway space (late mesial shift).