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.

Ex Input:
Which would be the best method to use to dispose of cardboard boxes not utilized by a local grocery store?  
 (A) burn them once a month (B) send them to be dumped in a remote area (C) have them recycled for future paper products (D) put them into a dumpster with the rest of the trash

Ex Output:
C


Ex Input:
Which of these is the center of our solar system?  
 (A) Mars (B) The moon (C) Jupiter (D) The sun

Ex Output:
D


Ex Input:
Which item would a magnet attract?  
 (A) iron nail (B) wool cloth (C) wooden stick (D) glass marble

Ex Output:

A