The researchers completed two memory experiments. In the first experiment, the participants learned 40 groups of words. In the second experiment, the participants learned a series of finger signals. In both experiments, only half of the participants were told that they would be tested after 10 hours. All the participants in the test will be tested. Only a part of the participants will take a nap between the study and the test. It was found that the participants in the sleeping group performed better than the participants in the non-sleeping group and were told in advance to test Participants also had higher test scores; therefore, researchers believe that sleep helps the brain store memory information that is useful for the future. If the following items are true, which one can most refute the conclusion? ['The participants in Experiment 1 are all young people with good memory and studying in a language major.', 'Some of the participants who took a nap in Experiment 2 took the test with a relaxed attitude and achieved good results.', 'Participants who arrange napping time are younger teenagers, and it is well known that people have a better memory in their teenage years.', 'Some participants who were told to take the test did not fall asleep when they were napping, and they unconsciously reviewed what they had learned in their brains.']