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: 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
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Q: What force pulls things towards the center of Earth?  
 (A) magnetism (B) gravity (C) friction (D) energy

A: B
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Q: The functions of a plant's roots are to support the plant and  
 (A) make food (B) produce fruit (C) take in water and nutrients (D) aid in germination

A:
C
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