正解:D
Comprehensive and Detailed Explanation:
The most important step in a privacy audit is to ensure that all risks associated with PII handling are identified. This requires analyzing the entire PII data life cycle-from collection, processing, storage, and transfer to retention and destruction.
* Option A: Reviewing data management controls is part of the audit but is narrower than life cycle coverage.
* Option B: Privacy training is necessary, but training alone doesn't ensure compliance.
* Option C: Reviewing third-party agreements is important but only covers outsourced risks.
* Option D: Provides comprehensive coverage of privacy risks across all stages.
# ISACA Reference: CISA Review Manual 27th Edition, Domain 5, section on data privacy, data life cycle, and PII risks.