instruction:
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:
Which object works best when reflecting light?  
 (A) mirror (B) camera (C) binoculars (D) eyeglasses
answer:
A


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:
Which of these conditions would most likely be shown in the fossil record as a reason for mass extinctions?  
 (A) increased competition for resources (B) falling sea levels and global cooling (C) organisms with beneficial traits (D) increased solar activity
answer:

B