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: A light year is used to measure  
 (A) time. (B) distance. (C) luminosity. (D) temperature.

Output: B


Input: Consider Input: Typically, sedimentary rocks are formed  
 (A) only in erupting volcanoes. (B) only under great pressure and high temperatures. (C) below Earth's surface as magma cools and crystallizes. (D) from materials that settle.

Output: D


Input: Consider Input: Water puddles on a sidewalk evaporate when the Sun heats the water. Which of these best describes what is happening as the water evaporates?  
 (A) Water changes phase as it releases heat to the environment. (B) Water boils as it absorbs energy from the sidewalk. (C) Water becomes a gas as it absorbs energy from the Sun. (D) Water evaporates as its thermal energy is transferred to the air.


Output: C