A project's key stakeholders have requested significant changes that will affect the scope. To adjust the project scope, which of the following need to be changed? (Choose two.)

A cost performance parameter (such as CPI) is a monitoring metric used to measure cost efficiency against the baseline; it is not something directly changed to define or authorize a scope adjustment.

The project schedule must be updated because scope changes alter the tasks, durations, and dependencies required to deliver the project, making the existing timeline inaccurate and unreliable.

KPIs are performance measurement indicators used to track progress toward objectives; they describe how well the project is performing rather than defining the scope of work to be done.

A corrective action plan is a reactive document used to bring project performance back in line with the baseline; it does not authorize or document a new scope change.

The WBS is the foundational document that decomposes and defines the total scope of the project - any change in scope mandates a corresponding revision to the WBS to accurately reflect the new deliverables and work packages.