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.
--------
Question: Which form of energy are x rays and ultraviolet light?  
 (A) nuclear (B) heat (C) electromagnetic (D) chemical

Answer: C


Question: The most significant human-induced impact on Earth's atmosphere comes from the use of which energy resource?  
 (A) flowing water (B) fossil fuels (C) sunlight (D) winds

Answer: B


Question: What safety procedure should a student follow when a thermometer is broken during a lab experiment?  
 (A) tell the teacher immediately (B) stop the experiment immediately (C) sweep the glass into a biohazard container (D) use a paper towel to pick up the pieces

Answer:
A