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 Q]: 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 A]: C

[EX Q]: In an electric motor, electrical energy is converted into  
 (A) mechanical energy. (B) chemical energy. (C) thermal energy. (D) light energy.
[EX A]: A

[EX Q]: Life is more likely to be found on a planet whose atmosphere contains abundant  
 (A) neon. (B) oxygen. (C) hydrogen. (D) sulfur dioxide.
[EX A]:
B