In a test of 216 babies from June to December, researchers taught babies three new skills to play with a new finger puppet, and half of the babies fell asleep four hours after learning, but Other babies did not sleep or took a nap for less than 30 minutes. Studies have shown that, on average, babies who have enough sleep can remember 1.5 skills, but babies who don't sleep much do not remember one skill. Visible, Having enough sleep after your baby learns is good for memory. Which of the following is the assumption most likely to rely on in the above argument. ['The results of this study are equally applicable to adolescent groups.', "Adequate sleep is good for your baby's normal physical development.", 'The intelligence levels of the two groups of babies before the experiment were comparable.', 'Other studies have verified the reliability of this result.']