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
Extraction of 3rd molar tooth bud in 7-9 yr old child: 
Select and explain. 
A. Improves growth of maxilla, B. Causes excessive damage to the mandible, C. Results of future orthodontic treatment are	improved anterior teeth, D. Results in less crowding
D: Results in less crowding
Answer: D: Results in less crowding 
Explanation: None