Which of the following properties of DHCP would a technician use to ensure an IP address is not leasedout from the active scope?

Which of the following properties of DHCP would a technician use to ensure an IP address is not leasedout
from the active scope?

A.
Reservations

B.
Lease times

C.
Removing IPs from the active leases

D.
Configuring the DNS options