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: In an accurate diagram of the solar system, which object would be shown closest to Earth?  
 (A) the Moon (B) the asteroid belt (C) Mars (D) Saturn

Output: A


Input: Consider Input: Which of these statements about nonrenewable resources is true?  
 (A) They are inexpensive. (B) They help keep the air clean. (C) They can take millions of years to form. (D) They are used because they are easily removed from the ground.

Output: C


Input: Consider Input: Modern factories and industrial plants have filters that remove much of the sulfur from their emissions before it reaches the atmosphere. This design feature helps most in reducing the contribution of factories to which environmental problem?  
 (A) acid rain (B) habitat loss (C) coastline erosion (D) algal growth in lakes


Output: A