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
Which of the following may result if an excessive amount of monomer is incorporated into an acrylic resin mixture? 
Select and explain. 
A. Excessive expansion, B. Low impact strength, C. Excessive shrinkage, D. Excessive brittleness
C: Excessive shrinkage
Answer: C: Excessive shrinkage 
Explanation: Curing shrinkage arises as the monomer is converted to polymer and the free space it occupies reduces (approximately 20% less than that among unreacted monomers).
Reference: PHILLIPS’ SCIENCE OF DENTAL MATERIALS, 12th ed page no 293