Exam PgMP topic 1 question 384 discussion

A large international manufacturing company is centralizing its IT which is currently spread over 16 countries. The transition means physically regrouping the infrastructure and aligning processes and organizations. The high-level scope of this transformation encompasses three main areas:
1. The technology area--assessing which technology/tooling should be retained for the target data center.
2. The policies and procedure area--aimed at establishing a common set of processes supporting the new way of delivering services.
3. The HR area--assuring the new organization best fits the diversity of the countries and functional domains, while offering equivalent compensations for comparable functions.
You have selected your team and you are preparing the business case to support 1) the team selections you made and 2) your recommendation to proceed to the program's next phase.
Which document should be present in your business case?