Teacher: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.
Teacher: Now, understand the problem? Solve this instance: How could you scientifically determine the quietest place to study in your school?
(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.
Student:
C