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
Light orthodontic forces produce 
Select and explain. 
A. Light forces will not have any effect, B. Brings up osteoclasts with 10 seconds, C. Compression of blood vessel within 3-5 seconds on the pressure side, D. Compression of blood vessel in 2 hours on the tension side
C: Compression of blood vessel within 3-5 seconds on the pressure side
Answer: C: Compression of blood vessel within 3-5 seconds on the pressure side 
Explanation: None