Which service provides audit logs?

Alibaba Cloud ActionTrail continuously monitors, records, and retrieves user activities, API calls, and resource state changes across an account. It generates comprehensive event logs that enable operational auditing, compliance verification, security analysis, and resource tracking across Alibaba Cloud infrastructure.

Option A: CloudMonitor collects performance metrics and service operational status for alerts, but it does not record user administrative API audit logs.
Option C: Object Storage Service (OSS) provides scalable object storage capabilities and can store logs, but does not independently capture account operational audit events.
Option D: Elastic Compute Service (ECS) provides virtual compute instances and host infrastructure, not centralized user access and API operational audit logging capabilities.

1. Alibaba Cloud Documentation, ActionTrail User Guide, "What is ActionTrail?", Document ID: 28818, Section: Overview.

2. Alibaba Cloud Documentation, CloudMonitor User Guide, "CloudMonitor Overview", Document ID: 28600, Section: Introduction.