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: Genes are located on chromosomes which are composed of  
 (A) DNA. (B) RNA. (C) ATP. (D) ADP.
Example Output: A

Example Input: Which of these senses lets Dora know when a skunk has been close to her house?  
 (A) Taste (B) Touch (C) Smell (D) Hearing
Example Output: C

Example Input: A paper bag is ripped into pieces. Which of these BEST describes the pieces of the bag?  
 (A) Stronger than the whole bag (B) Thicker than the whole bag (C) Smaller than the whole bag (D) Darker than the whole bag
Example Output:
C