Definition: You are given a science question (hard-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 human population is increasing every day. How does this increase in population affect the natural resources that maintain humans?  
 (A) increases the supply of resources (B) decreases the amount of resources (C) results in less demand for resources (D) improves the quality of the resources
Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
B