Question 18 Explanation

The backups feature of the Oracle Cloud Infrastructure Block Volume service lets you make a point-in-time snapshot of the data on a block volume.These backups can then be restored to new volumes either immediately after a backup or at a later time that you choose.

You can copy block volume backups between regions using the Console, command line interface (CLI), SDKs, or REST APIs.

To copy volume backups between regions, you must have permission to read and copy volume backups in the source region, and permission to create volume backups in the destination region.

to do all things with block storage volumes, volume backups, and volume groups in all compartments with the exception of copying volume backups across regions.

Allow group VolumeAdmins to manage volume-family in tenancy

The aggregate resource type volume-family does not include the VOLUME_BACKUP_COPY permission, so to enable copying volume backups across regions you need to ensure that you include the third statement in that policy, which is:

Allow group VolumeAdmins to use volume-backups in tenancy where request.permission='VOLUME_BACKUP_COPY'

so as per the Answers of this Question the Most nearest one to correct is Answer number 3