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
To regain arch length in anterior segment by moving incisors labially 
Select and explain. 
A. Cephalometric analysis have to be made before taking up treatment, B. Use tongue blade therapy 20 times 1 day, C. Use of 7 spring with Hawley's retainer, D. Use on anterior bite plane
A: Cephalometric analysis have to be made before taking up treatment
Answer: A: Cephalometric analysis have to be made before taking up treatment 
Explanation: None