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.

Input: Consider Input: Emily made a cup of tea and stirred it with a spoon. The spoon became warm. How was the heat from the tea transferred to the spoon?  
 (A) convection (B) radiation (C) conduction (D) evaporation

Output: C


Input: Consider Input: The melting point of a compound was measured by three different scientists. It is acceptable for the scientists to display the same data differently because  
 (A) multiple methods are acceptable for organizing data. (B) melting point data is inconsistent. (C) the scientists collected data in different areas. (D) the data was measured with different instruments.

Output: A


Input: Consider Input: Which alternative energy resources use gravitational energy to make electricity?  
 (A) tidal energy and hydropower (B) geothermal energy and hydropower (C) wind energy and tidal energy (D) geothermal energy and wind energy


Output: A


