Which job configuration will keep all restore points safe in case the primary site and backups go down while still being able to do a point-in-time recovery of a SQL database from the backups on the second site?

A customer currently has one backup job that runs every four hours to backup their VMs in a transaction consistent state.

Which job configuration will keep all restore points safe in case the primary site and backups go down while still being able to do a point-in-time recovery of a SQL database from the backups on the second site?
A . Configure a second VM backup job and schedule it to copy every four hours, starting at midnight, to a repository on the second site
B . Configure a backup copy job in mirror mode, to a repository on the second site
C . Configure a backup copy job in pruning mode and schedule it to copy every four hours, starting at midnight, to a repository on the second site
D . Configure a backup copy job in pruning mode and have it copy data every day, starting at midnight, to a repository on the second site

Answer: B