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.

Input: Consider Input: Which occurs as a result of Earth's tilt on its rotating axis?
(A) movement of the tides (B) prevalent or trade winds (C) seasonal changes in the climate (D) light and dark changes of day and night

Output: C

Input: Consider Input: A population of ground squirrels has established a community in the grasslands of the Great Plains. Temperatures often reach -15C for most of the winter. What is the most likely behavior the ground squirrels use to survive these winter temperatures?
(A) burrowing below the frost point of the soil surface (B) burrowing in tree trunks above the soil surface (C) consuming roots found under the soil surface (D) consuming organisms found in the soil surface

Output: A

Input: Consider Input: Noah visited a park that had many oak trees. Which best describes the role of an oak tree in its ecosystem?
(A) Oak trees can live for a long time. (B) Oak trees have leaves that change colors. (C) Oak trees have strong branches and trunks. (D) Oak trees are a source of food and shelter for animals.
Output: D