This graph illustrates the results of an experiment where every 20 minutes subjects had to stay awake for 13 minutes and could sleep for 7 minutes. The amount slept within the allowed seven minute intervals are shown represented on the figure. What is the significance of allowing test subjects to sleep consistently throughout the experiment in short intervals? Frequent periods of sleep will minimize accumulation of sleep debt Frequent interruptions of sleep will increase the sleep pressure, allowing the researchers to study Process S. Frequent periods of sleep will greatly increase sleep pressure, allowing the researchers to study only Process S and not Process C. It allows the test subjects to stay in a consistently relaxed state