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: A cut to the skin is treated with antiseptic first to avoid
(A) an immune response. (B) a bacterial infection. (C) bruising of tissues. (D) an allergic reaction.

A: B
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Q: Four students tried to find out which magnet was the strongest. They each shared one idea. Which idea shows scientific thinking?
(A) We can pick the longest magnet. (B) We can pick the heaviest magnet. (C) We can measure the strength of the magnets. (D) We can vote for the magnet that we think is the strongest.

A: C
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Q: Which technique has helped scientists more accurately determine the age of fossils and draw conclusions about changes in organisms over time?
(A) time-lapse photography (B) radioactive dating (C) electron microscopy (D) color staining

A:
B
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