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: Which invention would a culture living above the Arctic Circle most likely develop?  
 (A) ice production (B) air conditioning (C) insulated clothing (D) irrigation canals

Output: C


Input: Consider Input: Heavy rain can cause soil to flow quickly downhill. What is this change called?  
 (A) a tornado (B) a flood (C) a landslide (D) an earthquake


Output: C