Sandy, a network technician, has implemented DHCP on the network last week. Employees are now
reporting duplicate IP addresses and network connectivity errors. Which of the following would
cause duplicate IP addresses on the network?

A.
A second DHCP server is on the network.

B.
The network IP leases are expiring and not renewing.

C.
The DNS record A pointers are incorrect.

D.
The DHCP server has run out of IP addresses to issue to clients.