Which is a description of the role of Line Management in the change process?

According to the Change Management Institute’s Change Management Roles Model, there are four main roles in change: Idea-Generator, Sponsor, Change Agent, and Target. Line Management is a sub-role of Change Agent, which is the role that promotes an idea to potential Sponsors and implements the change once it is approved. Line Management tests thinking and advises on effective delivery of change, as well as supports and coaches staff through the change. The other options are not descriptions of the role of Line Management, but rather of other roles or activities in the change process.References: https://apmg-international.com/sites/default/files/Change%20Management%20Foundation%20Sample%20Paper%2021%20-%20v1.0.pdf (page 11)