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: Which material is the best conductor of electricity?  
 (A) Wood (B) Metal (C) Stone (D) Plastic
Example Output: B

Example Input: Which is the best example of evaporation?  
 (A) raindrops freezing (B) an ice cube melting (C) a puddle drying in the sun (D) a sponge soaking up water
Example Output: C

Example Input: Some scientists study images of very distant celestial bodies. Where is the best location for the types of telescopes that can provide the scientists with the clearest images.  
 (A) at sea level (B) in outer space (C) on mountain tops (D) at higher latitudes
Example Output:
B