Which of the following is a structured review of the procurement process originated at the Plan Procurements process?

A procurement document package is a collection of solicitation documents sent to prospective sellers, not a review process of completed procurement activities.

Administer Procurements is itself an executing-and-monitoring process in the procurement lifecycle, not a review technique applied during Close Procurements.

Procurement auditing is a tool and technique used within the Close Procurements process that involves a systematic review of all procurement activities beginning at the Plan Procurements stage through Administer Procurements. The intent is to document lessons learned and identify successes and failures for organizational process asset updates. PMBOK formally defines it as spanning the full procurement lifecycle for retrospective review purposes.

Project Procurement Management is the overall knowledge area encompassing all procurement processes, not a specific structured review technique within Close Procurements.