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.

Input: Consider Input: 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

Output: D

Input: Consider Input: Which is the best tool for measuring the temperature of lake water?
(A) Meter stick (B) Balance (C) Graduated cylinder (D) Thermometer

Output: D

Input: Consider Input: The body is able to detect pressure on its surface by which direct means?
(A) releasing of hormones in skin (B) changing in volume of fat and muscle cells (C) signaling by sensory neurons (D) changing of voltage in interneurons
Output: C