The best reason to review audit logs periodically is to identify anomalies in use patterns that may indicate unauthorized or malicious activities, such as intrusion attempts, data breaches, policy violations, or system errors. Audit logs record the events and actions that occur on a system or network, and can provide valuable information for security analysis, investigation, and response. The other options are not as good as identifying anomalies, as they either do not relate to security (B), or are not the primary purpose of audit logs (A and D). References: CISSP All-in-One Exam Guide, Eighth Edition, Chapter 7, page 405; Official (ISC)2 CISSP CBK Reference, Fifth Edition, Chapter 7, page 465.