You will be given a definition of a task first, then some input of the task.
You are given a science question (easy-level) and four answer options (associated with "A", "B", "C", "D"). Your task is to find the correct answer based on scientific facts, knowledge, and reasoning. Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D'. There is only one correct answer for each question.

There are many different processes that take place in plant and animal cells. Cellular respiration is one of those processes. What is the purpose of cellular respiration?
(A) To make and store food (B) To add oxygen to the atmosphere (C) To release energy from stored food (D) To remove carbon dioxide from the atmosphere
Output:
C