You are managing a project to develop an organization's new website. The site will be highly complex and interactive, and neither your project team nor the client has much experience with this type of website development. The timeline is extremely aggressive. Any delay will be costly for both your firm and the client. You and the project sponsor have achieved agreement and sign-off on both the project charter and the project management plan. Client personnel have been kept fully informed of the project's progress through status reports and regular meetings. The project is on schedule and within budget, and a final perfunctory review has been scheduled. Suddenly you hear that the entire effort may be cancelled because the product being developed is totally unacceptable. What is the most likely cause of this situation? A. A key stakeholder was not adequately engaged in the project. B. The project charter and project management plan were not thoroughly explained to or adequately reviewed by the client. C. Communications arrangements were inadequate and did not provide the required information to interested parties. D. The project sponsor failed to provide adequate support for the project.