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: Large amounts of industrial gases are released into the atmosphere every day. What happens to those gases?  
 (A) They are broken down by ultraviolet light from the Sun. (B) They are converted into nitrogen and oxygen. (C) They rise through the atmosphere and go into outer space. (D) They remain in the atmosphere for long periods of time.

SOLUTION: D

PROBLEM: What is an environmental threat posed by oil and gas acquisition and transport that is not posed by the acquisition and transport of the energy resources uranium, and wood?  
 (A) habitat change (B) vehicle pollution (C) pipeline leaks (D) soil compaction and loss

SOLUTION: C

PROBLEM: In eukaryotic organisms, microtubules give cells structure, and microfilaments help the cell contract and move. Together, they combine to perform functions similar to what two human body systems?  
 (A) the endocrine and skeletal systems (B) the circulatory and respiratory systems (C) the skeletal and muscular systems (D) the integumentary and excretory system

SOLUTION:
C