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
Corpus adiposum refers to: 
Select and explain. 
A. Child reserve of energy., B. Child reserve of fat., C. Child reserve of protein, D. All of the above
A: Child reserve of energy.
Answer: A: Child reserve of energy. 
Explanation: None