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: When a cup of water at room temperature is put in a freezer, the water's state of matter will change from  
 (A) liquid to gas (B) gas to liquid (C) liquid to solid (D) solid to liquid

A: C
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Q: In a lab investigation, a student notes that two metal blocks have the same mass. Based on this observation, if the two blocks were put on opposite sides of a balance, they would best represent  
 (A) balanced forces. (B) unbalanced forces. (C) equal and opposite reactions. (D) objects in motion.

A: A
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Q: A mineral sample is obtained from a box, and acid is dropped on the sample to determine if it bubbles. Which best describes what should be done with the mineral after testing it?  
 (A) Return the mineral to its box. (B) Rinse the mineral with water, dry it, and return it to the box. (C) Wipe the mineral with a paper towel and return it to the box. (D) Put the mineral in the sink and leave it for the teacher to clean up.

A:
B
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