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: The floating arrow on a compass always points towards the  
 (A) west. (B) east. (C) south. (D) north.

A: D
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Q: Which part of an atom is involved in chemical reactions?  
 (A) nucleus and its particles (B) negatively-charged particles (C) neutrally-charged particles (D) positively-charged particles

A: B
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Q: In New York State, the longest period of daylight occurs during which month?  
 (A) June (B) March (C) December (D) September

A:
A
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