Question: How could you scientifically determine the quietest place to study in your school?

  Options: 
 A. Ask your principal where the best place is to study.
 B. Survey the student body to see where they like to study.
 C. Record the level of decibels in various places in the school, and compare the results.
 D. Have everyone be as quiet as possible, and then test the decibels in various places in your school. 
Answer: C