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 Q]: Which physical structure would best help a bear to survive a winter in New York State?
(A) big ears (B) black nose (C) thick fur (D) brown eyes
[EX A]: C

[EX Q]: Skunks spray a strong-smelling liquid to ___.
(A) get rid of wastes (B) attract prey (C) defend themselves (D) help nearby plants grow
[EX A]: C

[EX Q]: A student observes different characteristics of a rock. Which observation best describes a fact about the rock?
(A) It has a nice surface. (B) It has an interesting shape. (C) It is made of several layers. (D) It feels warm when touched.
[EX A]:
C