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.

Input: Consider 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

Output: A


Input: Consider Input: Which of these is the center of our solar system?  
 (A) Mars (B) The moon (C) Jupiter (D) The sun

Output: D


Input: Consider Input: The following advertisement was placed in the window of a camping supply store. "The double-thermal 'Polar Snooze' sleeping bag is here! It will keep you warm for winter camping!" Based on this advertisement, the best conclusion about Polar Snooze sleeping bags is that they  
 (A) are lightweight. (B) have insulation. (C) make winter camping easy. (D) cost less than other sleeping bags.


Output: B