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: Mr. Harris mows his lawn twice each month. He claims that it is better to leave the clippings on the ground. Which long term effect will this most likely have on his lawn?
(A) It will eventually cause the grass to stop growing. (B) It will prevent bacteria from invading the lawn. (C) It will provide the lawn with needed nutrients. (D) It will reduce the insect population.
Output:
C