A company wants to implement a disaster recovery solution with the shortest RPO between two private cloud datacenters. Which of the following techniques should be used?

Asynchronous replication copies data to the secondary site after it has been written to the primary site, introducing a slight delay and potentially a small data loss window (non-zero RPO) if the primary site fails before data is fully replicated.

Incremental backups capture changes since the last backup, resulting in a significantly longer RPO as data would need to be restored from the last full backup plus all subsequent incremental backups, meaning potential data loss up to the time of the last incremental backup.

Synchronous replication ensures that data is written to both the primary and secondary datacenters simultaneously before the write operation is acknowledged to the application. This guarantees a near-zero RPO, as all data is consistent at both locations at any given moment, minimizing potential data loss during a disaster.

Image cloning creates a copy of a virtual machine's disk at a specific point in time, but it is typically a manual or scheduled process, not providing continuous data synchronization for a near-zero RPO disaster recovery solution.