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
Disadvantage of polysulphide as impression material: 
Select and explain. 
A. High cost, B. Materials leaching out, C. Stretching leads to distortion, D. Difficulty in cast pouring
C: Stretching leads to distortion
Answer: C: Stretching leads to distortion 
Explanation: None