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: Divergent tectonic plate boundaries most commonly form  
 (A) ocean ridges. (B) ocean trenches. (C) non-volcanic islands. (D) continental mountains.

Output: A


Input: Consider Input: Two identical books are on opposite ends of a table. Which of these would increase the gravitational force exerted between the two books?  
 (A) decrease the distance between the books (B) decrease the mass of the books (C) decrease the mass of the table (D) decrease the temperature in the room

Output: A


Input: Consider Input: Denise was driving east over a hill in the afternoon, shortly after a rain shower. Suddenly the sun broke through the clouds, and she saw a rainbow ahead of her. Which of the following made the rainbow possible?  
 (A) Sunlight can be separated into all the colors of the rainbow. (B) Water reflects sunlight like a mirror to make it look colored. (C) Overhead black clouds reflect in puddles to cause a mirage. (D) Air pollution causes the sky to look colored under these conditions.


Output: A