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 two processes occur during the life spans of all animals?  
 (A) hibernation and migration (B) growth and development (C) changing color and shedding fur (D) building nests and communication

Ex Output:
B


Ex Input:
Which material is the best conductor of electricity?  
 (A) Wood (B) Metal (C) Stone (D) Plastic

Ex Output:
B


Ex Input:
Which statement best describes why a calcium-fortified juice would advertise that it is good for growing children?  
 (A) Calcium helps the growth of bones. (B) Calcium provides energy for growth. (C) Children need to drink a lot of fluids. (D) Children need calcium to prevent allergies.

Ex Output:

A