Instructions: 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: Which event helps to renew a resource?  
 (A) A seed is planted from a tree. (B) An offshore rig pumps oil. (C) A car is filled with gasoline. (D) An office is heated with coal.
Output:
A