Q: You are given a science question (hard-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.
In the summer, the Arctic fox's fur is dark gray or brown. In the winter, its fur is white. The changes in color enable the fox to
(A) stay dry in the winter. (B) hunt for food at all times. (C) stay warm in the summer. (D) blend in with its surroundings.
A:
D