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
K2SO4 in agar-agar is for: 
Select and explain. 
A. Accelerating the setting stage of gypsum, B. Increase strength, C. Give dimensional stability, D. None of the above
A: Accelerating the setting stage of gypsum
Answer: A: Accelerating the setting stage of gypsum 
Explanation: None