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:
A student is asked to bring something that feels rough to class. Which would be BEST for him to bring?  
 (A) Pillow (B) Marble (C) Sandpaper (D) Trading card

Ex Output:
C


Ex Input:
Why is it important to protect soil?  
 (A) It covers the bedrock layer in the earth. (B) It has nutrients used by plants to grow. (C) It holds many harmful pollutants. (D) It dries quickly in sunlight.

Ex Output:

B