A server is being backed up using a seven-day incremental GFS (Grandfather-Father-Son) tape rotation. The rotation starts on Mondays with backups starting at midnight. The grandfather tapes are sent to an offsite storage facility. All other tapes are stored onsite in a fireproof cabinet. A hard drive failure on Saturday afternoon requires data to be restored from tape.

How many tape sets are needed from the offsite facility?

A.
none

B.
one tape sets

C.
six tapes sets

D.
two tapes sets