Definition: You are given a question on nutrition. You are also given 4 answer options (associated with "A", "B", "C", "D"), out of which only one is correct. You need to answer the question by selecting the correct option. You should only answer with the choice letter, not the whole answer.
Input: What is the role of fatty acids in the body?

(A)Oxidized by cells to provide energy (B)Neuroendocrine regulation of appetite (C)Gastrointestinal hormone influencing stomach emptying, gall bladder contraction and intestinal motility. (D)All of the above

D