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 of the following is closest to the percentage of the total water on earth that is freshwater?  
 (A) 100% (B) 90% (C) 70% (D) 3%
Example Output: D

Example Input: Ribosomes present in a particular cell are smaller than those found in plants. In which taxonomic group or groups could the cell be classified?  
 (A) fungi only (B) archaea only (C) bacteria or archaea (D) bacteria or fungi
Example Output: C

Example Input: A large piece of ice is placed on the sidewalk on a warm day. What will happen to the ice?  
 (A) It will melt to form liquid water. (B) It will melt to form water vapor. (C) It will freeze to form liquid water. (D) It will not change at all.
Example Output:
A