Teacher: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.
Teacher: Now, understand the problem? Solve this instance: A student observes that a one-celled organism and a plant leaf have similar green parts. The student thinks that both organisms use the green parts to live. Which evidence supports the conclusion that both organisms need the green parts to live?
(A) Both organisms use the green parts to move. (B) Both organisms die if the green parts are removed. (C) The green parts in both organisms are observed making light. (D) The green parts in both organisms can make more green parts.
Student:
B