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: Which fact about water is an example of a chemical property?  
 (A) Water expands when it freezes. (B) The boiling point of water is 100ºC. (C) Water can separate into hydrogen and oxygen. (D) The density of water is greater than the density of ice.

Output: C


Input: Consider Input: Which source of data about Nevada resources is likely to be most current and reliable?  
 (A) a science encyclopedia (B) an article in a local newspaper (C) a government-maintained website (D) a student's classroom presentation

Output: C


Input: Consider Input: Which substance, when mixed with water, will produce the best conductor of electricity?  
 (A) table salt (B) granulated sugar (C) carbon dioxide (D) motor oil


Output: A