Which backup strategy satisfies the requirements?

Examine the backup requirement for your company: 1) Every Sunday, a backup of all used
data file blocks is performed. 2) Every Wednesday and Friday, a backup of all the changed
blocks since last Sunday’s backup is performed. 3) On all the other days, a backup of only
the changed blocks since the last day’s backup is performed. Which backup strategy
satisfies the requirements?

A.
level 0 backup on Sunday, cumulative incremental backup on Wednesday and Friday,
and differential incremental level 1 backup on all the other days

B.
level 0 backup on Sunday, differential incremental backup on Wednesday and Friday,
and cumulative incremental level 1 backup on all the other days

C.
full database backup on Sunday, level 0 backup on Wednesday and Friday, and
cumulative incremental level 1 backup on all the other days

D.
full database backup on Sunday, level 0 backup on Wednesday and Friday, and
differential incremental level 1 backup on all the other days