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 statement best describes how birth and death rates compare in a population at carrying capacity?  
 (A) The birth rate is greater than the death rate. (B) The birth rate is less than the death rate. (C) The birth rate is equal to the death rate. (D) The birth rate and the death rate are zero.
Example Output: C

Example Input: A biological community is made up of all the  
 (A) populations living in an area (B) natural resources present in an area (C) members of a species on Earth (D) environments on Earth
Example Output: A

Example Input: A hiker wants to know if air is warmer in a forest than in the nearby farm field. Which activity would best help the hiker find out which area is warmer?  
 (A) reading a book about farm fields (B) making a weather prediction for the forests (C) measuring the wind speed at both locations (D) recording the temperatures at both locations
Example Output:
D