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
Impression techniques are used for recording 
Select and explain. 
A. Oral mucosal tissues, B. Dental hard tissues, C. Oral mucosal tissues and dental hard tissues, D. None of the above
C: Oral mucosal tissues and dental hard tissues
Answer: C: Oral mucosal tissues and dental hard tissues 
Explanation: None