TASK DEFINITION: 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.
PROBLEM: Auroras occur where Earth's magnetosphere traps high-energy particles in which region of the atmosphere?  
 (A) troposphere (B) stratosphere (C) thermosphere (D) exosphere

SOLUTION: C

PROBLEM: A car runs out of fuel while traveling on a level road and eventually comes to a stop. Which of the following best explains why the car stops?  
 (A) Some of the energy of the car was lost to friction. (B) Some of the energy of the car was destroyed. (C) The amount of kinetic energy increased. (D) The amount of useful energy increased.

SOLUTION: A

PROBLEM: Students visited a garden to observe hummingbirds. They wanted to find out if hummingbirds were more likely to visit colored flowers or white flowers. Which should the students do first for this investigation?  
 (A) conclude that hummingbirds prefer white flowers (B) write a report about the kinds of flowers in the garden (C) observe hummingbirds at flowers and record the flower color (D) research the number of different hummingbirds that live in the garden

SOLUTION:
C