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.

[Q]: 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
[A]: A


[Q]: Which physical structure would best help a bear to survive a winter in New York State?  
 (A) big ears (B) black nose (C) thick fur (D) brown eyes
[A]: C


[Q]: A student is asked to measure the distance from the floor to the ceiling in a classroom. Which unit of measurement should the student most likely use to accurately measure this distance?     
 (A) liter (B) kiloliter (C) meter (D) kilometer
[A]:
C