TASK DEFINITION: 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.
PROBLEM: Which animal is preparing for a seasonal change in the environment?  
 (A) a bat flying at night (B) a deer drinking water (C) an owl eating a mouse (D) a squirrel storing nuts

SOLUTION: D

PROBLEM: When a dog sees a cat, a message travels from the dog's eyes to the dog's  
 (A) brain (B) nose (C) paws (D) muscles

SOLUTION: A

PROBLEM: Charisma has a goldfish she keeps in a tank. She planted several underwater plants in the bottom of the tank. How are the goldfish and the plants in the tank similar?  
 (A) Both add oxygen to the water. (B) Both perform photosynthesis. (C) Both are made up of cells. (D) Both eat food.

SOLUTION:
C