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.

Example Input: Which of the following helps the body to cool down?
(A) shivering (B) sweating (C) running a fever (D) taking deep breaths
Example Output: B

Example Input: A girl signals her friend by shining a flashlight on a mirror. Her friend can see the signal because
(A) heat energy can be transferred from one object to another (B) mechanical energy can be transferred from one object to another (C) sound energy can be reflected from one object to another (D) light energy can be reflected from one object to another
Example Output: D

Example Input: Which of these describes a location where minerals are most likely to form?
(A) cooled magma from a volcano (B) eroded sediment from a riverbed (C) weathered rock from a canyon (D) saturated soil from a floodplain
Example Output:
A