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 of these tools is best for recording observations outdoors?  
 (A) a ruler (B) a graph (C) a notebook (D) a calculator

Output: C


Input: Consider Input: The Sun is classified as  
 (A) an organism (B) a decomposer (C) a star (D) a planet

Output: C


Input: Consider Input: Earth can be viewed as an engine and heat exchange is part of the engine system. Which would be an example of a transfer of energy from the atmosphere to the lithosphere?  
 (A) A volcano erupts in the state of Washington. (B) An earthquake takes place off the coast of Japan. (C) A wild fire scorches a prairie in the upper Midwest. (D) A hurricane moves from the Gulf of Mexico onto land.


Output: D