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.

Input: Consider Input: Mrs. Tucker gives her class samples of different soil types. Which action best helps Tanisha identify each soil type?  
 (A) smelling it (B) touching it (C) weighing it (D) measuring it

Output: B


Input: Consider Input: One type of cold remedy is an effervescent tablet that breaks down in water. When the tablet is placed in water, it forms gas bubbles. In this example, the formation of a gas  
 (A) is a physical property. (B) occurs when adding water to acid. (C) is a sign of a chemical change. (D) occurs when the water boils.

Output: C


Input: Consider Input: Four solid balls, each with a different mass, are moving at the same speed. Which ball would require the most force to stop its motion?  
 (A) ball with a mass of 5 kg (B) ball with a mass of 10 kg (C) ball with a mass of 15 kg (D) ball with a mass of 20 kg


Output: D