Which solutions will meet these requirements with the LEAST administrative effort?

Explanations:

While creating an AMI lifecycle policy and scheduling backups is a valid approach, this option does not address the requirement to automate the copying of images to the us-west-2 Region, which is necessary for disaster recovery. It only mentions copying the image on demand, which does not meet the need for minimal administrative effort and the 24-hour data loss requirement.

This option automates the creation of AMIs based on tags and schedules backups to run twice daily. Furthermore, it specifies copying the AMI to the us-west-2 Region, thus ensuring that the company can recover workloads quickly in case of a disaster in the us-west-1 Region while keeping administrative effort low.

Although it mentions creating backup vaults and a backup plan based on tag values, it introduces unnecessary complexity by requiring an AWS Lambda function to copy backup data to the us-west-2 Region. This added complexity does not align with the requirement for minimal administrative effort.

This option utilizes AWS Backup to create a backup plan that automatically copies backups to the us-west-2 Region and defines a backup schedule to run twice daily. This solution meets the requirements of automating backups and ensures the ability to recover workloads with minimal administrative effort.

While this option mentions creating a backup vault and a backup plan, it only allows for on-demand copying to us-west-2. This does not align with the requirement for automation and the prevention of data loss exceeding 24 hours, as on-demand copying does not ensure timely disaster recovery.