What Is the Primary Purpose of Data and Systems Backup

What is the primary purpose of data and systems backup?

A) To restore all data and systems immediately after the occurrence of an incident.
B) To set the maximum allowable downtime to restore systems and data after the occurrence of an incident.
C) To set the point in time to which systems and data must be recovered after the occurrence of an incident.
D) To restore data and systems to a previous point in time after the occurrence of an incident.