What should the database specialist do to align to the high availability and disaster recovery requirements?
Use a Multi-AZ deployment in each Region.
Use read replica deployments in all Availability Zones of the secondary Region.
Use Multi-AZ and read replica deployments within a Region.
Use Multi-AZ and deploy a read replica in a secondary Region.
Explanations:
Multi-AZ deployment in each Region provides high availability within a single Region but does not meet the requirement for cross-Region disaster recovery and RPO/RTO.
Read replica deployments in all Availability Zones of the secondary Region do not ensure automatic failover or meet RPO/RTO requirements for disaster recovery.
Multi-AZ and read replica deployments within a Region do not provide cross-Region replication, which is necessary for disaster recovery across Regions.
Multi-AZ and read replica deployments in a secondary Region meet the cross-Region disaster recovery requirements, ensuring high availability and fast failover for RPO/RTO.
I evaluate that the answer is:
Use Multi-AZ and deploy a read replica in a secondary Region.