According to the PMBOK® Guide (Project Management Body of Knowledge), specifically within the Project Integration Management knowledge area:

Perform Integrated Change Control (Option D): This is the process of reviewing all change requests; approving changes and managing changes to deliverables, organizational process assets, project documents, and the project management plan; and communicating their disposition. PMI explicitly states that this process is conducted from project inception through completion and is ultimately the responsibility of the project manager. While a Change Control Board (CCB) may be responsible for approving or rejecting changes, the project manager oversees the entire integrated process to ensure that no change is made in isolation without considering its impact on all project constraints.

Monitor and Control Project Work (Option B): While also performed throughout the project, this process is focused on tracking, reviewing, and reporting the overall progress to meet the performance objectives defined in the project management plan. It is the " parent " process that identifies the need for a change, but the formal management of that change happens in Perform Integrated Change Control.

Control Quality (Option A): This process is focused on monitoring and recording results of executing the quality management activities to assess performance and ensure the project outputs are complete, correct, and meet customer expectations.

Control Scope (Option C): This is the process of monitoring the status of the project and product scope and managing changes to the scope baseline. It is a specialized control process, whereas Integrated Change Control covers all baselines.

In the PMI framework, Perform Integrated Change Control is the central " funnel " through which all change requests must pass, ensuring the integrity of the project ' s baselines from the day the project is chartered until the day it is closed.