Which of the following defines a group of projects that work together to achieve a common goal?

A customer asks a project manager if a small change can be made during the delivery phase. The project manager does not agree to the change.
Which of the following is the MOST likely reason?

Which of the following documents does a vendor rely on to commit funding and resources to a project?

A program manager informs a project manager that a new, high-priority project has been approved and will need the current project's resources before the scheduled project close date. The project team meets and determines that the project should be fast-tracked.
Which of the following documents should the project team reference to fast-track the project? (Choose two.)

A team lead informs the project manager that the datacenter will not be accessible when the project needs to be completed. The team lead also indicates that the team member who is assigned to complete the datacenter project is out on medical leave.
Which of the following should a project manager update to document this information?