35/5 In the description of the following experiment, determine the experimental factor. During a study testing the amount of sleep and its effect on test scores, the research team grouped the volunteers enrolled for the test into Group A and Group B. Group A received 4 hours of sleep while Group B received 8+ hours of sleep. Select the correct answer below: whether or not a person sleeps daily the effectiveness of 8+ hours of sleep the effectiveness of 4 hours of sleep the group receiving the 8+ hours of sleep E the amount of sleep received by each group Previous