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: Which scientist is credited with using a telescope in the seventeenth century to discover the moons of Jupiter?  
 (A) Galileo (B) Kepler (C) Einstein (D) Newton

Output: A


Input: Consider Input: All of the following are functions of a cell membrane except  
 (A) surrounding and protecting the contents of the cell. (B) releasing waste products from the cell. (C) producing energy for cell processes. (D) allowing gases to enter the cell.

Output: C


Input: Consider Input: Students were investigating the relationship between the length and period of a pendulum. They made a pendulum by using string to suspend a 0.5-kg mass from a fixed support. The students changed the length of the string and measured the time it took for the pendulum to complete ten cycles of motion. By dividing each time measurement by ten, they were able to calculate the period of the pendulum. What was the independent variable?  
 (A) the length of the pendulum (B) the period of the pendulum (C) the type of string used in making the pendulum (D) the amount of mass used in making the pendulum


Output: A