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? 

Answer options:

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

B