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.

Example Input: When sodium hydroxide reacts with a copper nitrate solution, the reaction vessel needs to be kept on ice to slow down the reaction. What best describes this reaction?  
 (A) an exothermic reaction that absorbs energy (B) an exothermic reaction that releases energy (C) an endothermic reaction that absorbs energy (D) an endothermic reaction that releases energy
Example Output: B

Example Input: Which of these warms most of the air, water, and land on Earth?  
 (A) Coal (B) Electricity (C) Sunlight (D) Wind
Example Output: C

Example Input: Students on a field trip discovered fossilized shark teeth on the side of a cliff. Which conclusion can best be made about the history of the area?  
 (A) It was once a hot desert. (B) It was once a shallow sea. (C) It was once part of a glacier. (D) It was once part of a rain forest.
Example Output:
B