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.

Example Input: Forests have been cut and burned so that the land can be used to raise crops. Which consequence does this activity have on the atmosphere of Earth?
(A) It reduces the amount of carbon dioxide production. (B) It reduces the production of oxygen. (C) It decreases the greenhouse effect. (D) It decreases pollutants in the air.
Example Output: B

Example Input: Which layer of Earth is the source of lava that erupts from volcanoes?
(A) asthenosphere (B) inner core (C) outer core (D) lithosphere
Example Output: A

Example Input: Which traits would a species of nocturnal predators most likely develop over time to survive in the wild?
(A) a small size (B) flat, grinding teeth (C) sharp vision and hearing (D) resistance to weather changes
Example Output:
C