Design Compute Engine deployment so that on a zonal outage the application restores in another zone quickly with the latest application data. What should you use?

The correct option leverages a regional persistent disk (PD) which is synchronously replicated across two zones within a region. This ensures that application data is immediately available in another zone if one zone experiences an outage. Combining this with an instance template allows for rapid deployment of new instances in the healthy zone, attaching them to the existing regional PD. The incorrect options are flawed for various reasons: Restoring a snapshot to a disk in the same zone doesn't protect against zonal outages. Restoring a snapshot to a disk in another zone introduces recovery time objective (RTO) delays due to the restoration process itself, which might not meet the "quickly" requirement. Deploying in another region with a regional PD is not ideal as regional PDs are confined to a single region. Cross-region data replication would require different mechanisms, and the question specifies restoring within "another zone," implying the same region.