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 force produces energy as heat?  
 (A) pull (B) gravity (C) friction (D) magnetic

Output: C


Input: Consider Input: How do plants get water and minerals?  
 (A) absorbed from the soil though the roots (B) absorbed from the soil through the stem (C) absorbed from the air through the flowers (D) absorbed from the air through the leaves

Output: A


Input: Consider Input: Which tool should be used to measure the stem length of a plant?  
 (A) a balance (B) a metric ruler (C) a graduated cylinder (D) a thermometer


Output: B