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 of these is a nonliving part of a forest?  
 (A) Tree (B) Soil (C) Worm (D) Mushroom

Ex Output:
B


Ex Input:
In a northern state, a room used for growing plants is not allowing enough light to enter for healthy plant growth. Adding windows in walls facing which direction would best solve this problem?  
 (A) north (B) south (C) east (D) west

Ex Output:
B


Ex Input:
How does the latitude of a region affect its climate?  
 (A) by increasing the length of days throughout the year (B) by increasing the amount of energy the land can absorb (C) by determining the angle of sunlight throughout the year (D) by determining the rate that tectonic plates can move

Ex Output:

C