Kim, a network administrator, has made changes to the DHCP leasing setup for a given network and is expecting all devices to recognize the changes shortly. However, after a full week, none of the machines on the company network are grabbing new addresses with the new lease time.
Which of the following is the problem?

A.
The lease time on the original configuration was too long.

B.
The firewall was never configured to recognize the changes.

C.
The DHCP server was never restarted, so changes never took affect.

D.
The lease time on the original configuration was too short.