A backup solution for a new cloud environment must meet the following requirements: - Use no more than two backup sets for a complete restore. - Minimize backup space used. - Support physical and virt

Weekly full backups establish a complete data baseline. Daily incremental backups store only the data that has changed since the *last* backup, whether that was a full or another incremental, making this the most space-efficient method. For a complete restore, you retrieve the last full backup and apply all subsequent incremental backups, which can be logically considered two backup 'sets' (the full and the cumulative incrementals), and this method supports both physical and virtual machines.

Weekly clones are full copies, which are very space-intensive and not primarily a backup method for ongoing data protection, and combining with incremental backups would not significantly minimize overall space.

While weekly full and daily differential backups require only two backup sets for a restore (the full and the latest differential), differential backups store all changes since the last full and thus use significantly more space than incremental backups, failing to minimize backup space effectively.

Weekly and daily snapshots via the hypervisor are typically for quick, short-term recovery of virtual machines, are not robust long-term backup solutions for both physical and virtual machines, and consume significant space on primary storage over time.