You are given a science question (hard-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 animal is preparing for a seasonal change in the environment?  
 (A) a bat flying at night (B) a deer drinking water (C) an owl eating a mouse (D) a squirrel storing nuts

A: D
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Q: A thermometer is best used to measure  
 (A) air pressure. (B) kinetic energy. (C) potential energy. (D) wind movement.

A: B
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Q: Which characteristic explains why powdered tea becomes a solution when mixed with water?  
 (A) The tea has an odor. (B) The tea spreads evenly through the water. (C) The tea and water separate easily. (D) The tea settles to the bottom of the container.

A:
B
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