instruction:
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.
question:
Which would be the best method to use to dispose of cardboard boxes not utilized by a local grocery store?  
 (A) burn them once a month (B) send them to be dumped in a remote area (C) have them recycled for future paper products (D) put them into a dumpster with the rest of the trash
answer:
C


question:
Where do good bacteria grow to help keep people healthy?  
 (A) in the brain (B) in the blood (C) on the skin (D) on the bones
answer:
C


question:
Which of these is the most common result of greenhouse gases altering the atmosphere of Earth?  
 (A) an increase in the air temperature (B) a decrease in the air density (C) an increase in the intensity of visible light (D) a decrease in the thickness of the ozone layer
answer:

A