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
A 14 year old female patient presents with a habit of lower lip sucking. Lip bumper was cemented onto the mandibular first molars. What is the anchorage value of this tooth? 
Select and explain. 
A. 533, B. 450, C. 475, D. 500
C: 475
Answer: C: 475 
Explanation: None