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: At what time on a sunny day will the shadow of the school's flagpole be the shortest?  
 (A) sunrise (B) noon (C) mid-afternoon (D) sunset

A: B
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Q: Which situation is the best example of an inherited trait?  
 (A) a boy playing with a ball (B) a bird building a nest (C) a horse pulling a wagon (D) a dog sitting on command

A: B
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Q: According to the Periodic Table of the Elements, mercury (Hg) is different from other metals because mercury is  
 (A) solid at room temperature. (B) liquid at room temperature. (C) lighter than all other metals. (D) heavier than all other metals.

A:
B
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