You have been assigned the task of designing a server and storage infrastructure for a disaster recovery site. The connection between the primary site and the recovery site is a single $1$ Gbps point to point OPTIWAN available $24/7.$

The following disaster recovery requirements have been identified:

All Databases should have a Recovery Point Objective $($RPO$)$ of $2$ hours

$$ CIFS Shares should have a Recovery Point Objective $($RPO$)$ of $1$ hour

Please choose the best solution to achieve the above requirements.

$$ Configure Database replication between each primary DB server and a DB server located at the DR site. Configure the replication for continuous replication. Configure at least two CIFS file servers, one located at the DR site and one located at the Primary site.

Configure both servers and their CIFS share data to be backed up every $12$ hours. If a failure occurs, restore the most recent backup to the DR site.

Configure two virtual machines as database servers at each site. Configure the database virtual machines to be backed up every $2$ days. If a failure occurs, restore the primary database VM to the disaster recovery site. Configure at least two CIFS file servers, one located at the DR site and one located at the Primary site, to replicate their data between each other every $15$ minutes $($DFS$)$ Robocopy, SureSync, Storage snapshots, etc.$).$

Configure an active$/$active database cluster at the Primary site. Configure at least two CIFS file servers, one located at the DR site and one located at the Primary site. Configure both servers and their CIFS share data to be backed up every $12$ hours. If a failure occurs, restore the most recent backup to the DR site.

Configure Database replication between each primary DB server and a DB server located at the DR site. Configure the replication for continuous replication. Configure at least two CIFS file servers, one located at the DR site and one located at the Primary site, to replicate their data between each other every $15$ minutes $($DFS$,$ Robocopy, SureSync, Storage snapshots, etc.$).$