A company plans to implement an "office-home, ButoneDay" plan, that is, all employees do not need to work in the office, they can choose any place they want to complete the work, such as home, playground . Colleagues must one day meet in the office for face-to-face communication. Which of the following explanation best illustrates the need for face-to-face communication? ['Face-to-face communication can help employees evaluate work progress.', 'Face-to-face communication can obtain some key non-verbal communication information.', 'Without the face-to-face communication in the office, the office loses its value.', 'Working independently for a long time without communicating with other colleagues will weaken the team spirit of employees.']