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 of these shows the correct order for the central dogma of molecular biology?  
 (A) DNA to protein to RNA (B) RNA to DNA to protein (C) protein to DNA to RNA (D) DNA to RNA to protein

Ex Output:
D


Ex Input:
A movie studio will use two methods of communication, television and the Internet, to advertise a new movie. Which of the following must both methods of communication use in order to show the advertisements to viewers around the world?  
 (A) systems to locate viewers (B) networks to transmit signals (C) printing to create the images (D) software to search for images

Ex Output:
B


Ex Input:
Animals and plants are made up of a number of different chemical elements. What happens to all of these elements when animals and plants die?  
 (A) They die with the animal or plant. (B) They evaporate into the atmosphere. (C) They are recycled back into the environment. (D) They change into different elements.

Ex Output:

C