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: The main function of a fish's fins is to help the fish  
 (A) reproduce (B) see (C) breathe (D) move
Example Output: D

Example Input: DNA technology has improved greatly in the last twenty years. Which task has been made easier by the development of DNA technology?  
 (A) identifying genetic disorders (B) determining the parts of an atom (C) observing distant objects in space (D) making very accurate measurements
Example Output: A

Example Input: If Earth revolved at a faster rate, what would most likely occur?  
 (A) Annual rainfall would increase. (B) Daylight hours would decrease. (C) Seasons would be shorter. (D) Annual temperature variation would be greater.
Example Output:
C