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 is the MAJOR reason Earth has seasons?  
 (A) Earth has a moon (B) Earth has a tilted axis (C) Earth has a magnetic field (D) Earth has an elliptical orbit

Ex Output:
B


Ex Input:
Research in which of these areas has the greatest impact on the environment?  
 (A) irradiating food (B) organic fertilizers (C) bacteria to clean up oil spills (D) developing larger, sweeter strawberries

Ex Output:
C


Ex Input:
Jonny climbed an apple tree. How are Jonny and the apple tree similar to each other?  
 (A) Both are made of cells. (B) Both take in carbon dioxide. (C) Both get nutrients directly from soil. (D) Both get energy from other organisms.

Ex Output:

A