The command chain refers to an uninterrupted line of power that extends from the highest level of the organization to the lowest level, clarifying "who reports to whom". It can answer such questions from employees: "Who do I go to when I have questions?" "Who am I responsible for? ". Which of the following organizational designs are not part of the command chain (). ['If there is a quality problem with an item purchased in a shopping mall, the shopping mall will allow the return of the goods, and then the shopping mall will claim from the product manufacturer.', "The work content and job authority of each employee of a company are very clear, so the role of the company's employees rarely appears vague, and the work efficiency is much higher than that of peer companies.", 'If the hospitalized patient is uncomfortable at night, please inform the nurse first. If the nurse does not know how to deal with the situation, ask the front-line doctor. If the front-line doctor cannot handle it, the second-line doctor is required.', 'A beverage factory has set up various levels of customs on its production line, and each gate sends responsible staff to strictly control the quality to ensure the quality of each bottle of beverages is safe and reliable.']