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 form of energy are x rays and ultraviolet light?  
 (A) nuclear (B) heat (C) electromagnetic (D) chemical

Ex Output:
C


Ex Input:
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.

Ex Output:
C


Ex Input:
Benjamin Franklin invented many different things. Among his inventions were bifocal glasses, the lightning rod, and a type of iron stove. Which personal quality most likely led to the invention of these things?  
 (A) humor (B) honesty (C) curiosity (D) leadership

Ex Output:

C