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.

Q: A student finds an animal in the wild. He decides it is a bird because it has  
 (A) fins. (B) scales. (C) feathers. (D) four legs.

A: C
****
Q: What force pulls things towards the center of Earth?  
 (A) magnetism (B) gravity (C) friction (D) energy

A: B
****
Q: Which items would be most useful at home during a power failure?  
 (A) flashlights and extra batteries (B) hats and sunscreen (C) raincoats and umbrellas (D) insect spray and jackets

A:
A
****