Organizational structure design refers to the design and redesign of organizational activities and organizational structures during the establishment or transformation of an organization. It is an activity to effectively combine and coordinate tasks, processes, powers and responsibilities. According to the above definitions, which of the following is organizational design? ['Mass layoffs due to economic crisis in a group.', "A company's R & D team has recently changed its name to R & D Center.", 'The sixth institutional reform of the State Council.', 'The number of chain stores doubled after the expansion of a hot pot restaurant.']