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: A student hypothesizes that algae are producers. Which question will best help the student determine if this is correct?  
 (A) Do algae consume other organisms? (B) Which organisms consume algae? (C) Do algae use sunlight to make food? (D) Could an ecosystem survive without algae?
Example Output: C

Example Input: In some locations, squirrels sleep for long periods of time during the winter months. Which of the following most likely causes these squirrels to sleep for long periods of time?  
 (A) increase in humidity (B) decrease in temperature (C) clouds forming in the sky (D) winds blowing in the night
Example Output: B

Example Input: Which statement is an inference?  
 (A) A thermometer shows that the air temperature is 56°F. (B) A mineral sample of galena produced a gray-black streak when tested. (C) Based on previous data, ten hurricanes may occur in the year 2013. (D) A weather vane indicates the wind is coming from the west.
Example Output:
C