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
One of the claims for the superiority composite resin restoration over silicate cement restorations is that the resin restorations: 
Select and explain. 
A. Prevent galvanic action, B. Are practically insoluble in oral fluids, C. Adapt to the walls of the cavity better, D. Have a higher coefficient of thermal expansion
B: Are practically insoluble in oral fluids
Answer: B: Are practically insoluble in oral fluids 
Explanation: None