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
When a posterior occlusal amalgam makes multiple
contacts with an occluding tooth surface, behaves as though it is in: 
Select and explain. 
A. Flexion, B. Compression, C. Shear, D. Diametral compression
A: Flexion
Answer: A: Flexion 
Explanation: None