A file system contains seven 1 gigabyte files. Each day of the week, a different file changes. Which backup strategy will minimize the overall time that it takes to do a recovery of the file system on Friday?

A.
Full backup on Saturday and incremental backups on all other days

B.
Full backup on Saturday, cumulative backup on Wednesday and incremental backups on all other days

C.
Full backup on Saturday and Tuesday, incremental backups on all other days

D.
Full backup on Saturday, cumulative backups on all other days