New PMP Question & Answers with explanation

Debbie, an IT project manager, is in the planning phase of a shopping website development project. A junior project manager, who has worked under her authority, started developing procedures for maintaining the integrity of cost and schedule performance baselines in the project. Where should the junior project manager store these procedures?
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You are in the final phase of a low-cost car manufacturing project. This project has successfully delivered a low-cost car that runs on batteries. However, to close this project and avoid auditing from government authorities, it must demonstrably comply with many administrative standards. Since your organization possesses experts who know closing procedures and standards, you want to use them to close this project. This effort is an instance of:
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You are managing a highly complex drug manufacturing project, and your sponsor is highly motivated and influential. You are optimistic about the outcome of the project; however, you are unsure about the project approval requirements that measure the project’s success. You would like to document the name of the person who signs off on the project and the criteria that constitute the project’s success. Which of the following documents should you use first to incorporate project approval requirements?
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Close Project or Phase is the process of completing and concluding all activities across all process groups to officially close the project. Which of the following activities is not performed during this process?
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Changes in projects are inevitable. Therefore, project managers must develop or use a system to manage and control changes. There are four types of changes that need to be controlled in a project: Project changes, deliverable changes, process changes, and baseline changes. The impact of each of these changes must be evaluated, and approved or rejected changes must be communicated to all stakeholders, as and when required. Which of the following helps control these changes?
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