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

Answer: D


Question: You wish to closely observe a small insect. Which tool is the best to use?  
 (A) a balance (B) a test tube (C) a telescope (D) a magnifying glass

Answer: D


Question: An agricultural scientist, George Washington Carver, is most famous for his research on  
 (A) tobacco. (B) peanuts. (C) mold. (D) corn.

Answer:
B