New PMP Question & Answers with explanation

A project can be authorized by any of the following except:
Select one
Procurement statement of work (SOW) is a narrative description of the products or services to be delivered by the vendor. It usually references all the following except:
Select one
A project charter that formally authorized a project was created. The project charter documented the initial requirements to satisfy stakeholders' needs and expectations. How often should the project charter be revised?
Select one
Which of the following is not an example of a work performance report?
Select one
All the monitoring and controlling processes and many of the executing processes can produce change requests as an output. Change requests may require corrective actions and preventive actions. Which of the following are normally affected by corrective and preventive actions?
Select one