The answer is the fourth one (d): change request.
Explanation for each option:
a.) Sign-off request: This is typically a document or form used to obtain formal approval or consent from stakeholders or management for a particular decision or project phase. It does not usually include a description of adjustments, impact statements, or implementation plans.
b.) Communication plan: This is a document that outlines how information will be disseminated to stakeholders throughout a project. It focuses on communication strategies and methods rather than documenting specific project adjustments.
c.) Risk register: This is a tool used in project management to identify, assess, and manage risks. It includes information about potential risks, their impact, and mitigation strategies, but it does not document project adjustments.
d.) Change request: This is a formal proposal for an alteration to some aspect of a project. It typically includes a description of the change, an impact statement, and an implementation plan, making it the correct choice for documenting adjustments to a project.
In summary, a change request is the appropriate document to use when adjustments are made to a project, as it includes all necessary details about the change, its impact, and how it will be implemented.