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.

Example Input: In animal skin tissue, cell division is responsible for  
 (A) growth and repair (B) sexual reproduction (C) obtaining energy (D) production of sex cells
Example Output: A

Example Input: When oxygen combines with hydrogen, which substance is formed?  
 (A) water (B) vinegar (C) hydrochloric acid (D) hydrogen dioxide
Example Output: A

Example Input: From which part of the plant does a bee get food?  
 (A) flower (B) seed (C) stem (D) root
Example Output:
A