Which of the following is associated with sustained acceleration in Kotter's change model?

In Kotter's change model, instituting the change is associated with sustained acceleration because this step focuses on making changes a permanent part of the organization's culture and operations. It involves reinforcing new behaviors, systems, and processes to ensure they are not just temporary alterations but integral to how the organization functions moving forward.

This stage requires ongoing commitment and support from leadership to help embed the changes deeply within the company's structure. By instituting the change, organizations can avoid regression to previous ways of working, thus ensuring that the momentum gained during earlier phases of the change process is maintained. This is crucial for the long-term success of any transformational initiative and for ensuring that the benefits of the change are realized over time.