Which document defines how changes to the project will be processed and approved?

Correct answer: Change Management Plan

Option C is correct because the Change Management Plan is the subsidiary project management plan component that defines the change control process, including how changes are submitted, evaluated, approved, or rejected, and implemented. Option A, the Scope Statement, documents what is and is not included in the project scope but does not define the change approval process. Option B, the Change Log, is a document used to track change requests and their status over time, not to define the process itself. Option D, the Project Management Plan, is the overarching document that contains all subsidiary plans including the Change Management Plan, but the specific guidance on processing and approving changes resides in the subsidiary plan.