Instructions: You are given a science question (hard-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.
Input: All organisms process nutrients. Which sentence best describes how plants and animals process nutrients similarly?
(A) Energy from sunlight produces nutrients. (B) Nutrients increase the strength of cell walls. (C) Cells break down nutrients into usable forms. (D) Nutrients are broken down by the digestive system.
Output:
C