Mary is managing a process improvement project. She is currently identifying her project stakeholders and populating the stakeholder register. The project sponsor has asked Mary to use the project's procurement documents as an input to this process as well. What could be the reason behind this request?

A. This is an internal project and the sponsor wants to ensure that the project doesn't involve any procurement activity.

B. The project sponsor is not a supporter of the project and wants to place impediments.

C. The customer of this project is an external party and this project is based on an established contract.

D. Procurements documents are mandatory inputs of the Identify Stakeholder process for any project and the sponsor wants to ensure compliance.