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
Annealing is also known as: 
Select and explain. 
A. Soft hardening treatment, B. Hard hardening treatment, C. Precipitating heat treatment, D. Stress relieving heat treatment
A: Soft hardening treatment
Answer: A: Soft hardening treatment 
Explanation: None