Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Which set of descriptions correctly states the difference between a population and a community?
(A) Population: one species in an area Community: one species worldwide (B) Population: organisms in a small area Community: organisms in a large area (C) Population: living parts of an area Community: living and nonliving parts of an area (D) Population: one type of organism in an area Community: many types of organisms in an area
Student:
D