An organization created an Amazon Elastic File System (Amazon EFS) volume with a file system ID of fs-85ba41fc, and it is actively used by 10 Amazon EC2 hosts. ...

An organization created an Amazon Elastic File System (Amazon EFS) volume with a file system ID of fs-85ba41fc, and it is actively used by 10 Amazon EC2 hosts. The organization has become concerned that the file system is not encrypted.
How can this be resolved?

A. Enable encryption on each host's connection to the Amazon EFS volume. Each connection must be recreated for encryption to take effect. B. Enable encryption on the existing EFS volume by using the AWS Command Line Interface. C. Enable encryption on each host's local drive. Restart each host to encrypt the drive. D. Enable encryption on a newly created volume and copy all data from the original volume. Reconnect each host to the new volume.