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: What kind of energy conversion occurs after a candle is lit?  
 (A) friction to electrical energy (B) light energy to heat energy (C) mass to kinetic energy (D) chemical energy to light energy

A: D
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Q: All of the following can become fossils except  
 (A) bones. (B) shells. (C) teeth. (D) rocks.

A: D
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Q: In addition to oxygen, which gases make up the largest percentage of Earth's atmosphere?  
 (A) hydrogen, helium, and water vapor (B) hydrogen, methane, and ozone (C) carbon dioxide, water vapor, and nitrogen (D) carbon dioxide, methane, and helium

A:
C
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