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

[EX Q]: What MAJOR advantage does nekton have over plankton in locating food?  
 (A) Nekton can actively swim. (B) Nekton can see in the dark. (C) Nekton do not eat much food. (D) Nekton can eat anything in the ocean.
[EX A]: A

[EX Q]: The Milky Way is a part of 30 or more galaxies called the Local Group. Which would be the most likely reason these galaxies are considered to be part of the Local Group?  
 (A) They are all the same type of galaxy. (B) They all have the same number of stars. (C) They are all attracted to each other by gravity. (D) They can all be seen without the aid of a telescope.
[EX A]:
C