When used in the process of performing a failed system restore, for which of the following backup types must you start the data restoration process using a full backup?

A.
Incremental backup

B.
Differential backup

C.
All of the above.

D.
None of the above.

Explanation:
With incremental backups, to perform a restore after a server system failure, you need to restore the most recent full backup first. You then need to perform a sequential restoration using each incremental backup that was performed since the last full backup.
With differential backups, you also need to restore the most recent full backup first. After this, you need to perform a sequential restoration using each incremental backup that was performed since the last full backup, or use a differential backup. Using a differential backup in the system restoration process takes longer than using an incremental backup because every changed file since the last full backup is included in the backup.
References:
Charles J. Brooks, Server+ Certification Exam Cram 2 (Exam SK0-002), QUE Publishing, Indianapolis, 2006, pp. 442-443.