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:
What change would occur if Earth's rate of rotation significantly increased?  
 (A) The year would be shorter. (B) The year would be longer. (C) The day would be shorter. (D) The day would be longer.

Ex Output:
C


Ex Input:
What type of force keeps the planets orbiting the Sun?  
 (A) gravitational (B) magnetic (C) electrical (D) nuclear

Ex Output:
A


Ex Input:
Which of the following is responsible for determining the traits of an organism?  
 (A) number of phosphates (B) amount of thymine (C) sequence of nucleotides (D) type of bond between bases

Ex Output:

C