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
Permanent bending of an orthodontic wire during its clinical application will leads to work hardening of the  alloy, this might cause: 
Select and explain. 
A. Increase in strength, B. Decrease in ductility, C. Development of internal stresses, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: None