David Is a Network Administrator in an Organization

Multiple Choice

David is a network administrator in an organization. The organization's DHCP server has crashed and cannot be brought back online. The last backup is four days old. How can he preserve the current address space without restarting all user computers?

A) Deploy a new DHCP server with the same address scope and increase the new lease duration to 15 days.
B) Deploy a new DHCP server with the same address scope and raise conflict detection attempts to 3.
C) Restore the previous DHCP database from a backup.
D) Run the Ipconfig /renew command on all computers.