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: If an ecosystem's balance is disturbed by a volcanic eruption, what will most likely occur?  
 (A) The ecosystem will not change from its original state. (B) The ecosystem will eventually become balanced again. (C) The consumers in the ecosystem will begin to consume carbon dioxide. (D) The consumers in the ecosystem will begin to produce more oxygen.

Output: B


Input: Consider Input: Which situation is the best example of an inherited trait?  
 (A) a boy playing with a ball (B) a bird building a nest (C) a horse pulling a wagon (D) a dog sitting on command

Output: B


Input: Consider Input: When trees are removed from a tropical rain forest, other plants and animals are affected. Which statement identifies another change that will most likely occur when a rain forest habitat is destroyed?  
 (A) Oxygen levels will increase. (B) Carbon dioxide levels will increase. (C) The temperature of Earth will decrease. (D) The air pollution in the atmosphere will decrease.


Output: B