Definition: 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: The need for farmland in Brazil has led to the cutting of the rain forests in the Amazon. Cutting trees in the Amazon rain forest might have a global effect by
(A) decreasing the amount of fresh water (B) increasing the number of animal species (C) decreasing the average yearly temperatures (D) increasing carbon dioxide levels in the atmosphere
Output:
D