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 is the center of our solar system?  
 (A) Mars (B) The moon (C) Jupiter (D) The sun

A: D
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Q: Which tool would be best to use for counting the number of legs on an ant?  
 (A) ruler (B) hand lens (C) calculator (D) microscope

A: B
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Q: Which action represents the use of technology to solve a problem?  
 (A) reducing the amount of heartburn with the use of herbal teas (B) answering mathematical equations with the use of computers (C) bringing down body temperature with the use of a hand fan (D) increasing the supply of fish with the use of fish farms

A:
B
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