Refer to the Exhibit.

You are designing a new backup and recovery solution. You have determined that a disk-aware
backup-to-disk solution will be used as the primary destination for backups. Once backups reach a
specific retention period on disk, they will be moved to tape.
To satisfy 90% of the e-mail restore requests from disk, what is the minimum required retention
period?

A.
2 days

B.
7 days

C.
14 days

D.
15 days