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
Endodontically treated posterior teeth are more susceptible to fracture than untreated posterior teeth. The best explanation for this is: 
Select and explain. 
A. Moisture loss, B. Loss of root vitality, C. Plastic deformation of dentin, D. Destruction of the coronal architecture
D: Destruction of the coronal architecture
Answer: D: Destruction of the coronal architecture 
Explanation: None