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: While Anna was testing a circuit, she dropped a light bulb. What is the safest thing Anna can do?  
 (A) get a new bulb to finish the test (B) push the broken glass under a table (C) tell her teacher that she broke the bulb (D) ask her partner to help pick up the broken glass

SOLUTION: C

PROBLEM: Melting, boiling, and freezing are examples of  
 (A) physical changes. (B) chemical changes. (C) magnetic changes. (D) electrical changes.

SOLUTION: A

PROBLEM: A small aluminum cube is dropped into a beaker of water to determine the buoyancy. Which of these is not necessary in determining the buoyant force acting on the cube?  
 (A) density of water (B) displaced volume (C) gravitational pull on Earth (D) density of the aluminum cube

SOLUTION:
D