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
The degree to which the health education message is perceived as trustworthy by the receiver is called 
Select and explain. 
A. Setting an example, B. Comprehension, C. Credibility, D. Reinforcement
C: Credibility
Answer: C: Credibility 
Explanation: None