Final answer:
An administrative group is most likely to initiate planned change.
Step-by-step explanation:
Planned change usually comes from a variety of people in different positions within an organization. However, in the given options, the most likely person to initiate planned change would be an administrative group.
An administrative group consists of individuals who have decision-making authority and strategic planning responsibilities in an organization. They often collaborate to identify areas that require change and develop plans to implement those changes.