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.

[EX Q]: 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
[EX A]: A

[EX Q]: Which of these natural disasters are the most unpredictable?  
 (A) earthquakes (B) hurricanes (C) tornados (D) blizzards
[EX A]: A

[EX Q]: Which measurement describes the motion of a rubber ball?  
 (A) 5 cm (B) 10 m/s (C) 15 newtons (D) 50 grams
[EX A]:
B