What method can an IT project manager invoke to ensure that third parties will reach 100 percent completion on a project?
A. Retain payment until the integrator reports the project is finished.
B. Retain payment until the project manager approves the deliverables.
C. Ask the vendor to add a few extra tasks to complete the project.
D. Assign the final tasks in the critical path to an internal project to ensure the project is finished as planned.