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: Auroras occur where Earth's magnetosphere traps high-energy particles in which region of the atmosphere?  
 (A) troposphere (B) stratosphere (C) thermosphere (D) exosphere
Example Output: C

Example Input: On a cold, cloudy day, the local weather forecaster predicts that a high-pressure system will be moving into the area in the next 24 hours. Which weather conditions will this system most likely bring to the area?  
 (A) stormy (B) sunny (C) snowy (D) hot
Example Output: B

Example Input: Which of the following describes diffraction?  
 (A) the bouncing back of waves as they meet a surface (B) the bending of waves as they pass from one medium to another (C) the bending of waves as they pass an edge or an opening (D) the combining of two waves that meet at a point
Example Output:
C