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 Input:
Which of these is not a benefit of microorganisms?
(A) They release nutrients in soil. (B) They help make antibiotics. (C) They cause food to spoil. (D) They break down waste.

Ex Output:
C

Ex Input:
A ship leaks a large amount of oil near a coastal area. Which statement describes how the oil most likely will affect the coastal habitat?
(A) Fish reproduction rates will increase. (B) Water birds will be unable to use their wings. (C) Water plants will be exposed to more sunlight. (D) Coastal plants will have access to more nutrients.

Ex Output:
B

Ex Input:
A mass of air is at an elevation of 1000 meters in the low pressure center of a Northern Hemisphere storm. Which of the following best describes the motion of air particles in this air mass due to storm conditions and the rotation of Earth as the air mass moves outward?
(A) Air particles move up and to the left. (B) Air particles move up and to the right. (C) Air particles move down and to the left. (D) Air particles move down and to the right.

Ex Output:
B