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
Hydroquinone is added to methyl methacrylate
monomer 
Select and explain. 
A. To prevent polymerization during storage, B. To initiate release of free radicals, C. To enable polymerization reaction at room temperature, D. All of the above
A: To prevent polymerization during storage
Answer: A: To prevent polymerization during storage 
Explanation: None