A SysOps Administrator Is Maintaining an Application Running on Amazon

Multiple Choice

A SysOps Administrator is maintaining an application running on Amazon EBS-backed Amazon EC2 instances in an Amazon EC2 Auto Scaling group. The application is set to automatically terminate unhealthy instances. The Administrator wants to preserve application logs from these instances for future analysis. Which action will accomplish this?

A) Change the storage type from EBS to instance store.
B) Configure an Amazon CloudWatch Events rule to transfer the logs to Amazon S3 upon an EC2 state change to terminated.
C) Configure the unified CloudWatch agent to stream the logs to Amazon CloudWatch Logs.
D) Configure VPC Flow Logs for the subnet hosting the EC2 instance.