After collecting high-level project objectives and developing an SOW, senior executives typically develop a charter before embarking on a project. Which of the following correctly states the purpose of the project charter? O a. It is a document issued to formally sanction the existence of a project and authorizes project manager to begin applying organizational resources. O b. It is a document issued to formally authorize the project manager's authority and includes the details of the work breakdown structure. O c. It is a document that states the business case for the project as well as the detailed project schedule and budget. O d. It is a document that states the scope statement and maintains a collection of all planning documents for each knowledge area for all phases of the project