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]: In some locations, squirrels sleep for long periods of time during the winter months. Which of the following most likely causes these squirrels to sleep for long periods of time?  
 (A) increase in humidity (B) decrease in temperature (C) clouds forming in the sky (D) winds blowing in the night
[A]: B


[Q]: What season is the Northern Hemisphere experiencing when it is tilted away from the Sun?  
 (A) spring (B) summer (C) autumn (D) winter
[A]: D


[Q]: Which sequence correctly shows the levels of increasing organization in the human body?  
 (A) tissues -> cells -> organ systems -> organs (B) cells -> tissues -> organs -> organ systems (C) organs -> organ systems -> cells -> tissues (D) organ systems -> organs -> tissues -> cells
[A]:
B