Nancy has recently taken over a website development project. The project is already in execution and half of the project work has been completed. Nancy finds out that the stakeholder register does not contain any information about key stakeholders from the buyer of the product. What is the potential root cause of this issue?

A. Project stakeholders change over time.

B. The previous project manager was not competent.
C. This is an unknown risk that has just occurred.
D. The Identify Stakeholders process was not properly carried out in the past.