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.

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
D

During which stage of an insect's life cycle does the female lay eggs?  
 (A) nymph (B) larva (C) pupa (D) adult
D

Male peacocks have large brightly colored tail feathers. What is the most likely reason for this?  
 (A) to attract potential mates (B) to distract potential predators (C) to help catch food (D) to preserve warmth

A