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.

Input: Consider Input: Jeannie put her soccer ball on the ground on the side of a hill. What force acted on the soccer ball to make it roll down the hill?  
 (A) gravity (B) electricity (C) friction (D) magnetism

Output: A


Input: Consider Input: A scientist uses angstrom units to measure the distance between two points. The scientist is most likely measuring the distance between two  
 (A) atoms. (B) cities. (C) continents. (D) stars.

Output: A


Input: Consider Input: A patient visits the doctor for a checkup and is diagnosed with skin cancer. Which of the following is the most likely cause of this disease?  
 (A) poor eating and sleeping habits (B) exposure to ultraviolet rays (C) a defect in the person's immune system (D) working with plants and animals


Output: B