Which of the following describes risk mitigation?

A project manager wants to introduce the practice of a WBS to the PMO, but the other managers believe this will create extra work. Which of the following would BEST communicate the need for a WBS to the other managers? (Choose two.)

A company hires an outside vendor to provide 24/7 support.
Which of the following documents would determine the contractual obligations?

A project sponsor approaches the project manager with a change request. During the conversation, the project sponsor claims to understand the impact of the change to the project length and has the budget to handle the cost. The sponsor also tells the project manager to send whatever needs a signature. The project manager's NEXT step should be to:

A project team is composed of numerous team members who are located throughout a country. All personnel have identified core business hours. A team engineer based in a machine shop has a question during business hours for the project manager, who is located at a different facility.
Which of the following is the MOST expedient communication method, assuming the question can be resolved quickly?