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.

[Q]: The best example of balanced forces is a  
 (A) car increasing speed. (B) bus parked in a garage. (C) ball kicked along a flat surface. (D) roller coaster slowing down on an incline.
[A]: B


[Q]: Louis Pasteur created a process that reduced the amount of bacteria in milk. How does this process most likely benefit people?  
 (A) by helping to prevent food allergies (B) by encouraging people to eat healthy foods (C) by helping to keep people from becoming ill (D) by curing diseases caused by lack of vitamins
[A]: C


[Q]: The MAJORITY of the elements found on the Periodic Table of the Elements are  
 (A) gases. (B) metals. (C) liquids. (D) nonmetals.
[A]:
B