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 of these best describes wind energy?  
 (A) limited (B) renewable (C) damaging (D) inexpensive

A: B
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Q: One important use of coal is to produce energy for homes. Coal can be burned and converted to  
 (A) wind energy. (B) nuclear energy. (C) electrical energy. (D) solar energy.

A: C
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Q: A student climbs up a rocky mountain trail in Maine. She sees many small pieces of rock on the path. Which action most likely made the small pieces of rock?  
 (A) sand blowing into cracks (B) leaves pressing down tightly (C) ice breaking large rocks apart (D) shells and bones sticking together

A:
C
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