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: A chameleon can change colors to match its surroundings. This ability helps the chameleon survive because it can  
 (A) stay warm. (B) find a mate. (C) hunt for food. (D) be easily seen.

Output: C


Input: Consider Input: Tanya investigates which household objects are attracted to magnets. Which will help her make a conclusion?  
 (A) a prediction (B) a hypothesis (C) a list of supplies (D) a table of results

Output: D


Input: Consider Input: Ben wants to know if the amount of air in a basketball affects how high the basketball bounces. He fills three basketballs with air and drops each one three times. Which part of the experiment should Ben keep the same for each ball?  
 (A) the amount of air in each ball (B) the distance each ball is dropped (C) the time it takes to drop each ball (D) the number of times the ball bounces


Output: B