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.

Input: Consider Input: Which series correctly represents the levels of organization in an organism?  
 (A) cells -> organs -> organ system -> tissue (B) cells -> tissue -> organs -> organ system (C) tissue -> cells -> organ system -> organs (D) tissue -> organ system -> cells -> organs

Output: B


Input: Consider Input: Which two behaviors best demonstrate stewardship?  
 (A) reducing consumption, recycling wastes (B) increasing consumption, discarding wastes (C) reducing consumption, discarding wastes (D) increasing consumption, recycling wastes

Output: A


Input: Consider Input: Stomata are tiny pores located on the leaves of plants. These pores permit the exchange of gases between air in the environment and plant cells located inside the leaf. Which tissue performs a similar function in vertebrates?  
 (A) The cornea in the eye (B) The alveoli in the lungs (C) The chambers in the heart (D) The salivary glands in the mouth


Output: B