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
Implosion therapy mainly comprises of 
Select and explain. 
A. HOME., B. Humor., C. Relaxation., D. All of the above.
A: HOME.
Answer: A: HOME. 
Explanation: Implosion therapy mainly comprises of HOME, voice control and physical restraints