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 most easily recycled at school?  
 (A) plastic wrap (B) notebook paper (C) ice cream sticks (D) rubber erasers
Example Output: B

Example Input: The energy that is stored in food originally comes from  
 (A) air (B) soil (C) sunlight (D) water
Example Output: C

Example Input: An area is semiarid, has few trees, and is home to ground-nesting birds. This area is most likely part of which biome?  
 (A) tundra (B) taiga (C) grassland (D) desert
Example Output:
C