The hypothesis of an experiment is: if people listen to classical music as they fall asleep; they will sleep for longer periods of time. designing an experiment to test a hypothesis requires creative thinking. how could an experiment be designed to test the hypothesis described above? a) collect data on sleep duration time b) place a group in a quiet room as they go to sleep c) place a group in a room playing classical music as they go to sleep d) place a control group in a quiet room as they go to sleep, place an experimental group in a room with classical music playing as they go to sleep, and collect sleep duration data from each group