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
Non-verbal communication means 
Select and explain. 
A. Smiling., B. Eye contact., C. Both., D. None.
C: Both.
Answer: C: Both. 
Explanation: Communication: 2 types - verbal and non-verbal.
Verbal communication is best for younger children more than 3 years of age. Voice that is used should be constant and gentle. Tone of voice can express empathy and firmness.
Non-verbal communication is by body language - smiling, eye contact, by touching the child or by giving a hug.