Root cause analysis identifies underlying reasons for control deficiencies or inefficiencies, enabling organizations to address systemic issues and enhance controls. IIA Practice Guide: Root Cause Analysis (2018) highlights its role in promoting continuous improvement. Reperformance (Option A) and vouching (Option B) are audit techniques to verify accuracy but do not diagnose systemic issues. Independent confirmation (Option C) corroborates evidence but does not uncover root causes. Root cause analysis aligns with the CIA Part 2 objective of enhancing organizational efficiency.