TASK DEFINITION: You are given a science question (easy-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.
PROBLEM: Overuse of soil for farming causes local disruptions of several Earth subsystems. Which of these is a part of the biogeochemical cycle that experiences the most severe local disruption?  
 (A) release of carbon into the atmosphere (B) release of oxygen into the atmosphere (C) cycling phosphorus into the soil (D) cycling hydrogen into the soil

SOLUTION: C

PROBLEM: The basic life functions of an organism are carried on by  
 (A) cells (B) nutrients (C) atoms (D) hormones

SOLUTION: A

PROBLEM: Rabies can lead to an infection of the brain. This directly causes problems in the  
 (A) excretory system. (B) nervous system. (C) skeletal system. (D) integumentary system.

SOLUTION:
B