While creating the work breakdown structure (WBS) with the team, the project manager highlights that the customer requested a proof of concept and will only continue the project based on the results of the proof of concept. A key team member insists that since this customer has a history of requesting proof of concepts and continuing with the projects, the team needs to plan for the whole project, not just the proof of concept. What should the project manager do? A. Instruct the team member to continue with the current work. B. Evaluate the scope of work as described in the project charter. C. Implement the 100% rule for creating the WBS. D. Validate with the team member, and create a WBS for the entire project