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: Organisms contribute to the water cycle mainly through the process of  
 (A) irrigation. (B) evaporation. (C) precipitation. (D) transpiration.

Output: D


Input: Consider Input: Which of the following climates has cold winters and hot summers?  
 (A) polar (B) subtropical (C) temperate (D) tropical

Output: C


Input: Consider Input: The breakdown of ozone into oxygen results from the electromagnetic absorption spectrum of ozone. This production of oxygen in the ozone layer is caused by exposing ozone to a strong source of which type of electromagnetic radiation?  
 (A) radio waves (B) microwaves (C) infrared light (D) ultraviolet light


Output: D