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: Consider Input: An infectious disease causes an increase in the body temperature and a decrease in the blood glucose levels of a deer. What is most likely an effect of this disease?  
 (A) a disruption in the homeostasis of the deer (B) a change in the genetic makeup of the deer (C) an increase in the energy level of the deer (D) an increase in the reproductive rate of the deer

Output: A


Input: Consider Input: The skin is the largest organ in the human body. Why is skin considered to be an organ?  
 (A) It is made of cells. (B) It acts as a barrier. (C) It is made of tissues. (D) It is part of an organism.

Output: C


Input: Consider Input: Scientists group animals based on physical features. Trout are classified as fish because of what physical feature?  
 (A) Fish have gills. (B) Fish eat the same food. (C) Fish live in the same area. (D) Fish have the same predators.


Output: A