Which of the following best describes progressive elaboration? A. Meeting with the group of stakeholders with highest interest right away, and then to meet with other shareholders later in time as the project work is being done B. Adding additional features to the deliverables which were not part of the scope baseline but enhance the project value C. Rolling Wave Planning is an form of progressive elaboration: near - term deliverables is planned in more detail than those occurring f urther down the road D. All of the above.