An RDS for PostgreSQL instance shows high CPU utilization. Operations needs operating-system process and thread information to identify what is consuming CPU on the DB instance. Which RDS feature supplies this level of operating-system detail?

1. Enable RDS Enhanced Monitoring and inspect the collected operating-system metrics.
2. Enable VPC Flow Logs for the database network interface.
3. Enable only standard CloudWatch DB-instance CPU metrics at a higher dashboard refresh rate.
4. Create an RDS event subscription for backup and failover notifications.