In a study, researchers observed the participation of nearly 300 children in grades 2 to 4 in the classroom during a school year. Participation is measured based on concentration and distraction during the class. The former refers to answering questions, raising hands to speak or participate in discussions, and the latter refers to activities such as chatting. In the experiment, half of the students stood in front of the high desk and listened to the lecture, while the other half sat and listened to the lecture. It was found that students who stood and listened to the class were more attentive than those who sat. Which of the following, if true, best supports the above conclusion? ["Standing requires the brain to balance the body and control minor muscle contractions. These moderate pressures will make people's attention more concentrated.", 'Sitting for long periods of time will increase the pressure of the body on the spine, which is not conducive to the health of students.', 'Even when standing to listen to a class, some students will move back and forth, affecting the order of the class and distracting others.', 'Many lively students prefer to stand in class and have better concentration, while introverts are willing to sit in class and feel more conducive to improving attention.']