What should the project manager do first?

A project manager is managing a project which has a very complex and long execution period Although the project is mostly predictive, the team was able to break the design and execution into smaller packages using a hybrid framework. The business wants to keep track of the value delivered by this framework application but there is no defined set of measurable items for the framework.

What should the project manager do first?
A . Work with the stakeholders to determine which measurable benefits can be tracked and assign an accountable person to monitor and report them
B. Create a report based on the work breakdown structure (WBS) and update it on a regular basis.
C. Use the same benefits tracking process from the last predictive project and add this to the monthly status report
D. Research which templates of reports were used the most for this framework and incorporate them into the project

Answer: A